Specializing in pet food machinery !

Dog Snack Production Line Technical Guide: Equipment & Process Steps

Retail display of various pet food products on shelves
A vibrant retail display showcasing an array of pet food products in a well-organized environment.

Part 1: Industry Overview and Market Insight

1. The Rise of Dog Snacks

Over the past two decades, the global pet food industry has transformed from a niche market into one of the fastest-growing sectors in the food industry. Within this ecosystem, dog snacks—ranging from jerky treats to dental chews and biscuits—represent a high-margin, innovation-driven category that reflects broader trends in pet humanization and premiumization.
Dog owners no longer view treats as occasional indulgences but as essential tools for training, oral health, and emotional bonding. As a result, the global dog snack market continues to expand at a compound annual growth rate (CAGR) exceeding 6–8%, outpacing the broader pet food segment.

According to industry analysts, global sales of dog snacks surpassed USD 20 billion in 2024, accounting for roughly 15–20% of total pet food revenue. The U.S., Europe, and China dominate consumption, but emerging markets in Southeast Asia, Latin America, and the Middle East are now rapidly expanding due to rising disposable incomes and changing pet-keeping cultures.

2. Market Evolution: From Treat to Functional Nutrition

Originally, dog treats were simple baked biscuits with limited nutritional intent. Today, the market has diversified into multiple functional categories:

TypeKey PurposeExample Products
Training TreatsSmall, high-palatability snacks for behavior reinforcementMini meat cubes, semi-moist pellets
Dental ChewsSupport oral hygiene and reduce tartarGreenies®, Whimzees®, dental sticks
Jerky TreatsHigh-protein, natural meat snacksChicken, duck, or beef jerky strips
Soft & Moist TreatsEnhanced texture and flavor retentionSemi-moist bite snacks
Rawhide BonesLong-chewing entertainment treatsKnotted bones, pressed hides
Functional TreatsNutritional or therapeutic benefitsJoint-care, skin-care, probiotic snacks

This product diversification has directly driven innovation in production technology—from extrusion and drying systems to automated forming, coating, and packaging lines.

pet food cutting machine (1)
pet food cutting machine (1)

3. Technological Drivers Behind Modern Dog Snack Production

The modernization of dog snack manufacturing has been propelled by three main forces:

(1) Automation and Consistency

Early treat production was largely manual, resulting in inconsistent shapes and variable quality. Modern dog snack plants utilize fully automated production lines, often integrating:

  • Twin-screw extruders for dental chews and soft treats
  • Forming and cutting machines for biscuits and jerky
  • Continuous dryers for moisture uniformity
  • Oil-spraying and flavoring systems for surface enhancement
    Automation ensures precise control of moisture, texture, and shape, while drastically reducing labor and contamination risks.

(2) Ingredient Science and Nutritional Design

Manufacturers are investing in nutritional formulation and functional additives—collagen, glucosamine, omega-3, probiotics—to differentiate products. Modern extrusion technology allows incorporation of these ingredients without nutrient loss, as temperature and residence time can be accurately controlled.

(3) Food Safety and Traceability

With increasing regulatory scrutiny—particularly after previous incidents involving contaminated pet treats—food safety has become central. Advanced production lines now feature:

  • Stainless steel 304/316L construction
  • CIP (Clean-in-Place) sanitation systems
  • PLC + HMI controls for data logging and traceability
  • Compliance with FDA, CE, ISO, and GMP standards
global cat and dog food market growth trend 2025 2029
global cat and dog food market growth trend 2025 2029

4. Global Market Segmentation

By Product Type

  • Jerky Treats: ~30% of global market
  • Dental Chews: ~25%
  • Biscuits & Baked Treats: ~20%
  • Soft & Moist Treats: ~15%
  • Rawhide & Long-Chew Treats: ~10%

By Region

  • North America: Mature, innovation-driven; strong demand for grain-free and clean-label snacks.
  • Europe: Focus on sustainability and organic certification; high standards for ingredient transparency.
  • Asia-Pacific: Fastest growth, led by China, Japan, and South Korea; localization of flavors (duck, fish, chicken).
  • Latin America & Middle East: Expanding pet population and modern retail distribution boosting adoption.

5. Value Chain Overview

A modern dog snack production ecosystem typically involves the following stages:

  1. Raw Material Supply – Meat, starches, cereals, plant proteins, flavorings.
  2. Pre-Processing – Grinding, mixing, hydration, emulsification.
  3. Forming or Extrusion – Creating specific shapes (sticks, bones, cubes).
  4. Drying / Baking – Removing moisture for shelf stability.
  5. Coating / Flavoring – Applying oils, palatants, or supplements.
  6. Cooling & Conveying – Controlled transition for product stabilization.
  7. Packaging – Automatic weighing, sealing, nitrogen flushing.
  8. Quality Control & Logistics – Testing, labeling, and distribution.

Each stage requires dedicated equipment that can be integrated into a complete, continuous line, ensuring seamless production and energy efficiency.

6. Industrial Players and Equipment Suppliers

The dog snack production industry features several global equipment manufacturers specializing in pet treat machinery. They typically provide turnkey solutions, from single machines to full factory setups.
Typical offerings include:

  • Twin-screw extruder systems for dental sticks
  • Jerky cutting and drying systems
  • Automatic biscuit forming & baking lines
  • Rawhide pressing machines
  • Multi-head weigher packaging machines

Chinese suppliers like Darin Machinery have become internationally recognized for providing cost-effective, CE-certified, and export-ready dog snack production lines. Their modular design allows flexible configuration for different snack types—ideal for manufacturers seeking to enter multiple treat segments with a shared infrastructure.

7. Key Success Factors in Dog Snack Manufacturing

AreaStrategic ImportanceDescription
Consistent Quality★★★★★Precise control of moisture and texture determines shelf life and consumer acceptance.
Product Differentiation★★★★☆Innovations in shape, color, and nutritional function enhance competitiveness.
Food Safety Compliance★★★★★Compliance with global standards (FDA, CFIA, EU Feed Hygiene) ensures market access.
Automation & Efficiency★★★★☆Reduces labor, energy, and waste while improving productivity.
Brand Storytelling & Packaging★★★★☆Premium visual design and clean labeling build trust with pet owners.
darin customer
Darin customer

8. Challenges and Opportunities

Challenges

  • Rising raw material costs (meat, gelatin, starch)
  • Stringent regulatory standards for exports
  • Short product life cycles due to trend-driven market
  • Need for continuous R&D and sensory testing

Opportunities

  • Plant-based or insect protein dog snacks
  • Personalized nutrition via extrusion flexibility
  • Sustainable packaging (bio-based films, recyclable bags)
  • IoT-based production monitoring and traceability

The dog snack industry sits at the intersection of food technology, animal nutrition, and consumer lifestyle. As global pet ownership grows and premiumization deepens, manufacturers capable of integrating flexible, hygienic, and automated production lines will dominate the next decade.

In the following section, we will dive deeper into the technical and formulation principles behind dog snacks—examining raw materials, ingredient functionality, nutritional balancing, and how these choices determine equipment configuration and process flow.

Part 2: Dog Snack Classification & Formulation Principles

1. The Foundation of Snack Innovation

The formulation stage is the heart of dog snack production. Every product type—jerky, dental chew, biscuit, or soft treat—begins with a precise recipe that balances nutrition, texture, flavor, and processability. The choice of raw materials determines not only the dog’s acceptance and health outcomes but also the machine configuration, extrusion temperature, drying curve, and packaging requirements.

In the modern pet snack industry, formulation design integrates both animal nutrition science and food engineering principles. Manufacturers must comply with AAFCO, FEDIAF, or equivalent nutritional standards, ensuring adequate levels of protein, fat, fiber, and essential micronutrients, while maintaining taste, chewability, and shelf stability.

2. Main Dog Snack Categories by Processing Method

Dog snacks can be systematically classified by processing technology, as each process dictates the formulation requirements:

Processing MethodProduct TypeTypical MoistureTextureExample
ExtrusionDental Chews, Soft Treats10–20%Elastic, chewyDental sticks, twisted chews
BakingBiscuits, Crunchy Treats5–8%Crisp, dryDog biscuits, baked bones
Drying / DehydrationJerky Treats, Meat Strips12–18%Fibrous, denseChicken or duck jerky
Pressing & ShapingRawhide Bones8–12%Hard, long-lastingKnotted bones
Injection MoldingSpecial Shapes or High-End Chews8–15%Smooth, flexible3D-shaped chews

Each method has unique thermal and mechanical profiles, determining ingredient compatibility (e.g., starch gelatinization, protein denaturation, fat tolerance).

3. Core Raw Materials and Their Functional Roles

High-quality dog snacks depend on selecting and combining the right raw materials. The typical ingredient groups are:

(1) Protein Sources

Proteins provide essential amino acids, structure, and chew texture.
Common options include:

  • Meat Meals: Chicken, beef, duck, fish meal – main protein matrix
  • Plant Proteins: Soy protein, pea protein, wheat gluten – for structure and elasticity
  • Gelatin / Collagen: Enhances chewiness and glossy texture in dental treats
  • Hydrolyzed Proteins: Improve palatability and digestibility

Design Tip: For jerky and dental chews, use 25–40% protein; for biscuits, 10–20% is sufficient.

(2) Carbohydrates & Binders

Carbohydrates provide energy and structural integrity:

  • Wheat Flour / Corn Starch: Primary binders for baked snacks
  • Potato Starch / Tapioca Starch: Excellent expansion and softness in extruded chews
  • Modified Starches: Improve water binding and processing tolerance
  • Cellulose Fiber: Controls density and improves digestion

Key Ratio: In extrusion-based lines, 25–40% starch ensures proper gelatinization and elasticity.

(3) Fats and Oils

Provide flavor, energy, and mouthfeel.

  • Animal Fats: Chicken oil, beef tallow – enhance palatability
  • Vegetable Oils: Sunflower, canola, coconut oil – used for coating or as emulsifiers
  • Omega-3 Additives: Fish oil, flaxseed oil – promote skin and coat health

Fat levels should be optimized between 5–10%, depending on drying capacity and desired texture.

(4) Functional Additives

Improve health and product stability:

  • Mineral & Vitamin Premixes (A, D, E, B, Ca, P, Zn)
  • Glucosamine & Chondroitin – joint support
  • L-carnitine – fat metabolism
  • Natural Antioxidants – rosemary extract, mixed tocopherols
  • Preservatives – potassium sorbate, citric acid for shelf life extension

(5) Flavorings & Palatants

Dogs are sensitive to meat aromas. Flavor enhancers such as liver hydrolysate, yeast extract, or smoke flavor are added either in the dough or via surface oil coating after drying.

(6) Water

Though often overlooked, water content and distribution affect extrusion stability, expansion ratio, and drying energy. Pre-conditioning typically raises total dough moisture to 25–30% before extrusion or forming.

4. Nutritional Targets and Balanced Formulation

To ensure complete and safe treats, manufacturers align recipes with nutritional standards. While treats are supplemental (not full diets), the composition still needs to be controlled:

NutrientTypical Range in Dog SnacksFunctional Impact
Crude Protein18–40%Muscle maintenance, flavor
Crude Fat5–10%Palatability, energy
Crude Fiber2–5%Digestive regulation
Moisture5–20%Texture, shelf life
Ash2–6%Mineral content
Additives (vitamins, probiotics)TraceFunctional benefits

Note: Jerky treats emphasize high protein and low moisture, while dental chews target moderate elasticity and digestibility.

5. Ingredient Preparation and Mixing Principles

Before entering the main forming or extrusion process, ingredients must be accurately weighed, crushed, mixed, and conditioned. This stage determines uniformity and product repeatability.

Key Process Steps:

  1. Grinding: Raw meats or cereals are ground to uniform particle size (≤1 mm).
  2. Mixing: Ribbon or paddle mixers ensure homogeneous distribution of ingredients and liquids.
  3. Emulsifying: For jerky, meat emulsions are created to achieve fiber-like texture.
  4. Hydration: Starches and proteins absorb water for proper plasticization.
  5. Conditioning: Temperature and moisture are pre-stabilized (typically 70–90°C, 20–30% moisture) for extrusion readiness.

Modern systems include vacuum feeders, automatic dosing, and liquid injection ports to maintain precision.

6. Texture Design & Product Engineering

Texture is a key differentiator between dog snack types and is determined by raw material matrix + processing parameters.

Texture TypeKey Formulation ControlExample Product
Crispy / CrunchyHigh starch, low moisture, bakingDog biscuits
Elastic / ChewyHigh protein, gelatin, low expansionDental sticks
Fibrous / Jerky-likeMeat emulsion + slow dryingChicken jerky
Soft / MoistGlycerol + humectantsSemi-moist treats
Hard / Long-lastingRawhide + pressure dryingKnotted bones

The desired texture determines extruder configuration, die design, and drying curve. For example:

  • Dental chews use twin-screw extruders with controlled shear to develop elasticity.
  • Jerky strips use lamination or molding machines followed by low-temperature drying.

7. Moisture and Water Activity Control

Shelf stability depends on achieving target water activity (aw) below 0.85 to prevent microbial growth.

Different drying or baking methods are selected accordingly:

  • Hot air drying (jerky): 60–80°C for 2–6 hours
  • Baking (biscuits): 180–220°C for 10–20 minutes
  • Extrusion + drying (dental chews): staged dehydration to retain chewiness

Humectants (like glycerin, sorbitol) can maintain softness while preventing spoilage.

8. Cost Optimization and Local Ingredient Substitution

For emerging-market factories, cost efficiency without compromising quality is crucial.
Strategies include:

  • Replacing part of meat meal with soy protein isolate or DDGS (distillers dried grains).
  • Using rice flour or tapioca for gluten-free recipes.
  • Incorporating regional by-products (fishmeal, poultry meal) to enhance sustainability.
  • Adjusting extrusion moisture to reduce energy consumption.

Formulation software and pilot-scale trials help achieve consistent performance across ingredient variations.

9. Quality Assurance and Regulatory Compliance

Dog snack formulations must comply with:

  • AAFCO (USA) – Ingredient definitions and labeling
  • FEDIAF (EU) – Nutritional guidelines
  • GB/T standards (China) – Food safety and hygiene
  • ISO 22000 / HACCP – Production quality systems

Routine quality control includes:

  • Moisture analysis (oven method)
  • Protein testing (Kjeldahl or Dumas)
  • Microbiological assays
  • Texture and hardness tests
  • Sensory evaluation (odor, color, shape)

The art of formulating dog snacks lies in balancing nutrition, palatability, and processability. A well-designed formula aligns with the intended product texture and available equipment capabilities—ensuring stable extrusion, uniform drying, and attractive sensory properties.

In the next part, we will transition from formulation to process engineering, exploring the core production line design, process flow diagrams, and critical parameters that define successful dog snack manufacturing.

Part 3: Core Production Processes & Flow Diagram

1. Engineering the Snack Factory

The efficiency, consistency, and hygiene of dog snack production depend on how the entire process line is engineered — from ingredient preparation to final packaging. Modern pet treat manufacturing adopts a modular, continuous production concept, which allows for easy customization between different product types (jerky, dental, biscuit, or soft treats).

In this part, we’ll map the complete process flow, explain the function of each stage, and highlight key operational parameters critical to achieving stable quality and industrial scalability.

2. General Process Flow Diagram

While each product type has unique requirements, a generalized dog snack production line typically follows this structure:

Raw Material Preparation 
   ↓
Mixing & Emulsifying 
   ↓
Forming / Extrusion 
   ↓
Drying / Baking / Cooling 
   ↓
Surface Coating (Oil or Flavor) 
   ↓
Cutting / Shaping 
   ↓
Weighing & Packaging 
   ↓
Quality Control & Storage

Depending on the product type, some steps may be rearranged or combined (e.g., jerky may be formed before drying, while dental chews are extruded and shaped simultaneously).

3. Stage 1 – Raw Material Preparation

The first step ensures all ingredients — dry powders, meats, oils, vitamins — are preprocessed to the correct size and consistency.

Typical Equipment:

  • Meat grinder or crusher (3–8 mm output)
  • Hammer mill or pin mill for cereals and starches
  • Raw material silos with automatic feeding system
  • Dust collectors for hygienic operation

Key Controls:

  • Particle size uniformity: < 1 mm for extrusion lines
  • Raw meat temperature: kept below 10°C to prevent microbial growth
  • Magnetic separation to remove metallic impurities

Automation at this stage prevents manual handling errors and improves batch consistency.

triflavor kabobs processing line 133
triflavor kabobs processing line 133

4. Stage 2 – Mixing and Emulsifying

All ingredients are dosed into a ribbon mixer or paddle mixer according to the formulation. Liquids (water, oil, syrup) are injected through nozzles for even distribution.

For meat-based jerky treats, this stage includes emulsification — blending lean meat, fat, and water into a smooth paste.

Typical Equipment:

  • Horizontal double-shaft paddle mixer
  • Vacuum emulsifying tank (for jerky)
  • Liquid dosing pumps with flowmeters

Operational Parameters:

  • Mixing time: 5–10 min (dry); 15–20 min (wet)
  • Moisture content before extrusion: 25–30%
  • Emulsion temperature: ≤12°C for jerky

Uniform mixing directly affects product texture and extrusion stability.

5. Stage 3 – Extrusion or Forming

The forming process varies by snack type:

Product TypeForming MethodKey Machine
Dental Chews / Soft TreatsTwin-screw extrusionTwin-screw extruder
BiscuitsSheeting + CuttingRotary cutter or molder
Jerky TreatsMolding / RollingMeat forming machine
Rawhide BonesManual or automatic shapingRawhide forming press

(A) Extrusion System (for Dental Chews / Soft Treats)

The twin-screw extruder is the technological heart of modern pet snack lines. It converts a mixed powder into a plasticized, cooked mass that can be shaped into various forms.

Main Components:

  1. Feeder: Metered ingredient entry
  2. Preconditioner: Steam + moisture conditioning
  3. Twin-screw barrel: Mixing, shearing, and cooking
  4. Die head: Shaping section
  5. Cutter: Cutting into sticks or segments

Typical Parameters:

  • Barrel temperature: 100–160°C
  • Screw speed: 200–400 rpm
  • Moisture content (in): 25–30%
  • Moisture (out): 18–22%

Output: Continuous rope-like or twisted chew strips that maintain elasticity.

(B) Sheeting and Cutting System (for Biscuits)

For baked dog biscuits, the dough is rolled into sheets and cut using a rotary molder or cutter.

  • Sheeting thickness: 3–8 mm
  • Dough temperature: <25°C
  • Baking oven inlet temp: 180–220°C

This process ensures uniform biscuit thickness and prevents cracking.

(C) Molding for Jerky Treats

For meat jerky, the paste is fed into molding trays or roller molds to form flat sheets or specific shapes. Controlled compression ensures uniform fiber structure and density.

6. Stage 4 – Drying or Baking

Drying removes excess moisture, giving the snack its desired texture and shelf stability.

ProductDrying/Baking MethodTemperatureDuration
Jerky TreatsHot air drying60–80°C3–6 hours
Dental ChewsMulti-layer dryer80–120°C1–2 hours
BiscuitsTunnel baking180–220°C10–20 min
Soft TreatsLow-temp dryer60–90°C1–3 hours
Rawhide BonesRoom + hot air drying30–70°C12–48 hours

Dryer Options:

  • Multi-layer Belt Dryer: For continuous lines
  • Tunnel Oven: For biscuits
  • Batch Tray Dryer: For flexible production
  • Microwave Dryer: For fast internal moisture removal

Key Quality Targets:

  • Final moisture: 8–15% (depending on snack type)
  • Uniform color, no surface cracking
  • Low water activity (aw ≤ 0.85)

Energy-efficient dryers with air recirculation systems reduce operational cost and environmental impact.

high speed triflavor kabobs processing line
high speed triflavor kabobs processing line

7. Stage 5 – Surface Coating and Flavoring

After drying, snacks pass through oil sprayers or tumbling drums for surface coating. This step enhances flavor, appearance, and nutritional content.

Typical Additives:

  • Palatant oils (chicken, beef, liver flavor)
  • Vitamin/mineral spray
  • Natural colors (caramel, beetroot)

Control Parameters:

  • Oil coating: 1–3% of total weight
  • Air temperature: 30–40°C
  • Retention time: 30–60 seconds

Uniform coating ensures attractive shine and balanced taste. In high-end lines, nitrogen or CO₂ chambers prevent oxidation during oil application.

8. Stage 6 – Cooling and Cutting

Before packaging, snacks must be cooled to ambient temperature (≤40°C) to prevent condensation.

Equipment:

  • Ambient cooling conveyors
  • Airflow cooling tunnels
  • Cutting systems for portion control (guillotine or rotary knives)

For extruded chews, cutting occurs directly after extrusion, followed by cooling. For baked biscuits, cooling occurs before cutting to avoid breakage.

Key Controls:

  • Cooling time: 10–20 min
  • Product core temp: ≤ ambient +5°C
  • Surface oil solidification: fully achieved before packaging

9. Stage 7 – Weighing and Packaging

Modern factories use automatic weighing, filling, and sealing systems compatible with pillow bags, stand-up pouches, or jars.

Packaging Systems:

  • Vertical Form Fill Seal (VFFS) machines
  • Multi-head weighers for precise dosing
  • Nitrogen flushing for freshness
  • Metal detectors for safety compliance

Typical Specifications:

  • Packaging weight: 50–500 g per bag
  • Film materials: PET/PE or recyclable mono-PE
  • Printing options: Date coding, QR traceability

Proper packaging protects against moisture, oxidation, and contamination during storage and transportation.

10. Stage 8 – Quality Control and Storage

At the end of the line, the quality control team verifies:

  • Moisture content (oven test)
  • Texture analysis (hardness, elasticity)
  • Microbiological testing
  • Visual inspection for color and shape uniformity
  • Weight accuracy

Once verified, the finished products are palletized and stored in a dry, temperature-controlled warehouse (15–25°C, RH ≤ 60%).

11. Automation and Control Systems

Modern dog snack production lines integrate PLC and HMI control platforms for monitoring and recording every step.

Features include:

  • Temperature and moisture sensors in real time
  • Batch traceability (raw material to final package)
  • Energy usage optimization
  • Alarm and maintenance logs

These systems allow operators to adjust parameters easily, improving efficiency, repeatability, and product safety.

12. Process Optimization: Key Metrics

ParameterOptimal RangeImpact
Feed moisture25–30%Extrusion stability
Extruder torque60–80%Texture control
Dryer outlet moisture8–12%Shelf life
Product temperature at packaging≤40°CPrevents condensation
Energy consumption0.25–0.35 kWh/kgEfficiency benchmark

Regular calibration of sensors and preventive maintenance ensures consistent output and long equipment life.

The dog snack production process is a well-orchestrated integration of mechanical engineering, food science, and automation technology. Each stage—from mixing to packaging—must be precisely controlled to maintain consistent product quality, safety, and efficiency.

In the next section, we’ll move from the general process to specific production lines, starting with jerky and meat treat manufacturing, covering detailed process parameters, equipment selection, and texture optimization methods.

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Part 4: Jerky & Meat Treat Production Line

1. The Premium Segment of Dog Snacks

Among all dog snack varieties, jerky and meat treats are the most closely associated with “real meat” nutrition and human-grade perception. They are loved for their high protein, meaty aroma, and natural chewing texture.

In the global pet snack market, jerky treats account for over 30% of total sales, particularly strong in North America, Europe, Japan, and China. The segment has evolved from traditional manual drying into highly automated industrial meat processing systems that ensure hygiene, consistency, and traceability.

2. Product Characteristics and Formulation

Jerky-style dog treats are typically made from minced or emulsified meat—chicken, beef, duck, or fish—combined with binders and flavor enhancers to achieve flexible, fibrous texture and shelf stability.

Typical Formulation Example (for 100 kg batch):

IngredientPercentage (%)Function
Chicken meat (minced)55–60Protein base, flavor
Wheat gluten / soy protein8–12Structure & elasticity
Modified starch / tapioca10–15Water binding, shaping
Glycerol or sorbitol5–8Humectant, softness
Vegetable oil3–5Palatability, gloss
Minerals & vitamins1–2Nutrition balance
Natural flavor / smoke extract0.5–1Aroma enhancement

Final product moisture: 12–18%
Target protein: ≥30%
Water activity (aw): ≤0.85

The formulation must balance chewiness, elasticity, and shelf life while maintaining the visual appeal of meat fibers.

3. Process Flow of Jerky Treat Production Line

A modern jerky treat line is composed of the following main stages:

Raw Meat Preparation
   ↓
Grinding & Mixing
   ↓
Forming / Molding
   ↓
Drying (Hot Air or Combined)
   ↓
Cooling
   ↓
Surface Coating (Optional)
   ↓
Cutting & Packaging

4. Step 1 – Raw Meat Preparation

Raw meats (chicken, duck, beef, or fish) are received frozen or chilled. Proper handling at this stage ensures food safety and texture consistency.

Main Operations:

  • Thawing: In controlled air or water chambers (0–5°C).
  • Trimming: Removing skin, fat, and bones.
  • Grinding: 3–5 mm particle size for smooth texture.

Key Quality Targets:

  • Maintain meat temperature ≤10°C.
  • Avoid oxidation and microbial contamination.
  • Ensure lean-to-fat ratio of 8:2 for optimal chewiness.

5. Step 2 – Mixing & Emulsification

The ground meat is transferred into a vacuum mixer or emulsifying tank, where plant proteins, starch, humectants, and seasonings are added.

Equipment:

  • Vacuum meat mixer with paddle blades
  • High-speed emulsifier (optional for paste-like jerky)

Parameters:

  • Mixing time: 10–15 minutes
  • Vacuum level: -0.08 to -0.09 MPa (removes air)
  • Final mixture temperature: ≤12°C

Vacuum mixing improves color stability and ensures uniform protein gel formation during drying.

6. Step 3 – Forming / Molding

Jerky can be shaped into multiple forms:

  • Flat sheets (for slicing)
  • Strips (extruded type)
  • Sticks, cubes, or 3D-shaped snacks (molded)

Forming Methods:

MethodDescriptionTypical Equipment
Roller MoldingMeat paste passes through roller moldsContinuous jerky forming machine
Sheet FormingMeat is flattened by rollers and conveyed to dryersLaminating conveyor system
Extrusion FormingExtruded through dies for rope or strip shapesSingle/twin-screw meat extruder

Forming thickness: 3–8 mm
Forming temperature: 15–25°C

Uniform thickness ensures even drying and consistent chew texture.

7. Step 4 – Drying Process (Critical Stage)

Drying determines product texture, shelf life, and aroma profile. Jerky drying must reduce moisture gradually to prevent case hardening (surface drying too fast while core remains wet).

Hot Air Drying

Most common industrial method using multi-layer belt dryers or batch-type tray dryers.

Parameters:

  • Inlet air temperature: 70–85°C
  • Outlet temperature: 45–55°C
  • Drying time: 3–6 hours
  • Air velocity: 1.5–2.5 m/s

Combined Drying (Hot Air + Microwave)

For high-volume plants, a hybrid system speeds up internal moisture removal while maintaining tenderness.

Benefits:

  • 30–50% faster drying
  • Reduced energy consumption
  • Better color and flavor retention

Target: Final moisture 12–15%, uniform texture, no burnt edges.

8. Step 5 – Cooling

After drying, jerky must be cooled gradually to avoid condensation inside packages.

Cooling Equipment:

  • Stainless steel cooling conveyors
  • Air-circulation cooling tunnels

Parameters:

  • Product exit temperature: ≤ ambient +5°C
  • Cooling duration: 15–30 min

Improper cooling leads to “sweating” (surface moisture return), affecting shelf life.

9. Step 6 – Surface Coating (Optional)

To enhance flavor and appearance, jerky strips can be coated with oil or natural flavoring.

Equipment:

  • Rotary drum flavoring machine
  • Spray coating system

Coating materials:

  • Chicken oil / beef tallow (1–2%)
  • Natural colorants (caramel, paprika)
  • Palatants (yeast hydrolysate, liver powder)

After coating, products should pass through a brief secondary drying (50–60°C, 10–15 min) to fix the oil layer.

10. Step 7 – Cutting & Packaging

Depending on product format:

  • Sheet jerky → cut into strips or squares
  • Extruded sticks → cut to uniform lengths

Cutting Machines:

  • Pneumatic guillotine cutter
  • Rotary blade cutter (continuous lines)

Packaging Systems:

  • Vertical Form Fill Seal (VFFS) machine
  • Multi-head weigher for accurate dosing
  • Nitrogen flushing for oxygen-free sealing
  • Date printer and metal detector

Packaging Materials: PET/PE laminated film or recyclable mono-PE; typical bag size 50–300 g.

11. Hygiene and Quality Control

Since jerky is a high-protein, low-moisture product, microbial control is critical.

Key Hygiene Practices:

  • Equipment 304/316L stainless steel construction
  • Daily CIP (Clean-in-Place) sanitation
  • Segregated “raw” and “cooked” zones
  • Regular swab testing for Salmonella, E. coli, and mold

Quality Control Metrics:

ParameterTargetMethod
Moisture12–15%Oven test
aw (Water Activity)≤0.85Hygrometer
Protein≥30%Kjeldahl/Dumas
Hardness20–50 NTexture analyzer
Color uniformityConsistentVisual/optical test

12. Equipment Configuration Example (Jerky Line 500–800 kg/h)

SectionEquipmentFunction
Meat preparationGrinder, mixer, emulsifierCreate uniform meat paste
FormingRoller molding machineForm sheets or strips
DryingMulti-layer belt dryer (6 layers)Continuous dehydration
CoolingCooling conveyorStabilize moisture
CoatingRotary drum flavorerApply oil and palatant
CuttingPneumatic cutterPortioning
PackagingVFFS + nitrogenSealed bag packaging

Power: ~120 kW
Space required: ~20–25 m length
Operators: 3–4 persons per shift

13. Common Defects and Troubleshooting

ProblemPossible CauseCorrective Action
Uneven dryingNon-uniform thickness / air distributionAdjust roller or airflow
Case hardeningDrying temp too high initiallyLower initial stage temperature
CrackingExcess starch or over-dryingReduce binder or shorten drying
StickinessInsufficient drying or high humidityIncrease final drying time
Dull surfaceLack of oil coatingApply thin flavoring layer

Routine calibration and cleaning help maintain performance and product uniformity.

14. Innovation Trends in Jerky Treat Manufacturing

  1. Plant-based jerky using pea or insect protein for eco-conscious markets.
  2. Human-grade jerky treats processed under food-grade conditions.
  3. Smart drying systems with IoT humidity sensors for energy optimization.
  4. Hybrid flavor profiles — combining chicken with fruits or vegetables.
  5. Customized 3D-shaped molds to enhance brand recognition.

These trends drive demand for flexible and modular jerky lines capable of switching recipes and shapes quickly.

The jerky and meat treat production line exemplifies the harmony between traditional meat craftsmanship and advanced automation.
By mastering formulation precision, moisture control, and drying balance, manufacturers can produce premium-quality jerky treats that meet global standards for texture, flavor, and safety.

Next, we’ll move to another fast-growing category — Dental Chew Production Lines, where extrusion technology plays the starring role.

braid dog chews processing line (2)
braid dog chews processing line (2)

Part 5: Dental Chew Production Line

1. The Fusion of Nutrition and Functionality

Dental chews represent the most technologically sophisticated and functionally valuable segment in the dog snack market. Unlike jerky or biscuits, dental chews serve dual purposes — oral hygiene and chewing satisfaction — combining mechanical cleaning with nutritional benefits.

These treats are typically extruded from a blend of starches and proteins, creating a chewy, flexible texture that helps clean teeth, reduce tartar, and freshen breath. The global dental chew market is expected to exceed USD 6 billion by 2026, driven by humanization, veterinary endorsement, and innovation in plant-based formulations.

braid dog chews processing line
braid dog chews processing line

2. Product Characteristics

Dental chews are highly engineered, low-moisture snacks designed for controlled elasticity and durability. They may feature twisted, bone-shaped, or star-section profiles, often with multiple colors or fillings.

PropertyTypical RangeFunctional Purpose
Moisture10–18%Flexibility, shelf life
Protein15–35%Structure, chew resistance
Fat3–6%Palatability
Density1.1–1.3 g/cm³Bite resistance
Hardness20–60 NDental cleaning efficiency

3. Core Raw Materials

A successful dental chew formula balances chew texture, extrusion performance, and digestibility.

IngredientFunctionTypical Usage (%)
Starch (wheat, corn, tapioca, potato)Base material; provides expansion control30–45
Gelatinized rice / wheat flourBinder, chew texture10–20
Soy / pea protein isolateStructural strength10–15
Collagen / gelatinElasticity, dental cleaning3–8
Glycerin / sorbitolMoisture retention5–8
Animal / vegetable oilLubrication and flavor2–5
Colorants / palatantsVisual & taste appeal0.5–2
Functional additivesCalcium, chlorophyll, enzymes1–2

Target moisture before extrusion: 25–30%
Feed temperature: ≤30°C

Dental chews can be single-color, dual-color, or core-filled (two-component extrusion).

4. Process Flow Diagram

A standard dental chew line follows the sequence below:

Raw Material Mixing
   ↓
Preconditioning
   ↓
Twin-Screw Extrusion
   ↓
Forming & Shaping (Die Molds)
   ↓
Cutting
   ↓
Drying
   ↓
Cooling
   ↓
Surface Coating / Packaging

5. Step 1 – Mixing and Preconditioning

Dry and liquid ingredients are metered into a ribbon or paddle mixer, then conditioned with steam and water to form a uniform, plasticizable dough.

Equipment:

  • Horizontal ribbon mixer (with liquid spray system)
  • Preconditioner (steam + moisture injection chamber)

Typical Parameters:

  • Moisture after conditioning: 28–32%
  • Steam pressure: 0.3–0.5 MPa
  • Residence time: 1–2 minutes

Proper preconditioning reduces mechanical stress on the extruder and improves cooking uniformity.

6. Step 2 – Twin-Screw Extrusion (Core Process)

The twin-screw extruder is the heart of the dental chew production line. It applies mechanical shear and thermal energy to gelatinize starches, denature proteins, and produce a cohesive, moldable mass.

Key Components:

  1. Feeding system — gravimetric feeder
  2. Twin-screw barrel — segmented zones (feeding, mixing, cooking, venting, shaping)
  3. Die head — shaping the cross-section
  4. Cutter — variable-length cutting system

Typical Operating Parameters:

ZoneTemperature (°C)Function
Feeding30–60Moisture absorption
Mixing80–100Protein denaturation
Cooking110–150Starch gelatinization
Shaping90–110Stabilization

Screw speed: 200–400 rpm
Extruder torque: 60–80% rated capacity
Die pressure: 3–8 MPa

Output Moisture: 20–24%

Depending on die design, the extrudate can be twisted, co-extruded (dual-color), or hollow for filling.

7. Step 3 – Shaping & Cutting

The hot extrudate exits the die and is cut to the desired length immediately using a pneumatic or rotary cutter.
Shapes are defined by interchangeable die molds:

Shape TypeExampleDie Configuration
Flat / StickSimple rectangular chewSingle die
Bone ShapeClassic dog boneMolded die cavity
Twisted RopeDual-color spiralTwo-channel die
Star / GearDental ridgesMulti-lobe die
Co-extruded Core-FilledDental stick with soft centerDual extruder system

Length range: 50–150 mm
Product surface temperature: 80–100°C

Uniform cutting ensures consistent weight and drying behavior.

8. Step 4 – Drying

Fresh extruded chews have high moisture (~22%) and must be dried gently to reach 10–15%, preventing cracking or deformation.

Drying Options:

  • Multi-layer belt dryer (continuous type)
  • Batch hot-air oven (for small production)

Recommended Parameters:

  • Inlet air temp: 85–100°C
  • Outlet air temp: 50–60°C
  • Air velocity: 2–3 m/s
  • Drying time: 1.5–3 hours

Key Targets:

  • Uniform color and texture
  • No bubble formation
  • Final water activity ≤ 0.85

Tip: Multi-zone drying (high → medium → low temperature) ensures even moisture gradient and flexibility retention.

9. Step 5 – Cooling

Cooling stabilizes the product and ensures packaging safety.

Cooling System:

  • Stainless-steel conveyor with ambient or chilled air circulation
  • Cooling time: 10–20 min
  • Final temperature: ≤ ambient +5°C

Improper cooling can cause condensation and microbial risk inside sealed bags.

10. Step 6 – Surface Coating (Optional)

High-end dental chews may receive a thin oil or flavor coating to enhance palatability.

Coating Materials:

  • Chicken oil / beef tallow
  • Chlorophyll or mint extract (for breath freshness)
  • Vitamin or calcium powder

Application:

  • Rotary drum or fluid-bed coater
  • Coating quantity: 1–2% of product weight
  • Final fixing: low-temp drying at 50–60°C for 10 min

11. Step 7 – Packaging

After quality inspection, dental chews are weighed and packed automatically.

Packaging Systems:

  • VFFS (Vertical Form Fill Seal) or horizontal flow-wrap machine
  • Nitrogen flushing for oxidation prevention
  • Multi-head weigher for 10–500 g bags

Material: PET/PE or recyclable mono-PE
Features: Zip-lock reseal, printed branding, QR code traceability

Storage conditions: 15–25°C, RH ≤ 60%, shelf life 12–18 months.

12. Equipment Configuration Example (300–500 kg/h Line)

SectionMain EquipmentFunction
MixingRibbon mixerUniform blending
PreconditioningSteam preconditionerMoisture and heat treatment
ExtrusionTwin-screw extruderForming & cooking
CuttingRotary cutterLength control
DryingMulti-layer dryerMoisture reduction
CoolingConveyor tunnelTemperature stabilization
PackagingVFFS + nitrogenSealed bag packaging

Power: ~100–120 kW
Factory footprint: 25 × 3 m
Labor required: 3–4 operators

All contact surfaces are SUS304 stainless steel, meeting CE / ISO / FDA standards.

13. Troubleshooting Guide

DefectPossible CauseSolution
Bubbles or hollow coresOver-gelatinization or high feed moistureReduce barrel temperature or moisture
Cracking after dryingToo fast drying / low glycerolLower drying temperature; add humectant
Surface dullnessIncomplete gelatinizationIncrease cooking zone temperature
Sticky textureUnder-drying or excessive oilExtend final drying; reduce coating
Hard, brittle chewOver-drying or low proteinAdjust moisture or protein ratio

Routine maintenance of extruder screws, die cleaning, and sensor calibration ensures consistent results.

14. Innovation Trends in Dental Chews

  1. Dual-color or co-extruded sticks (visual appeal + dual flavor).
  2. Functional chews with probiotics, enzymes, or omega-3.
  3. Grain-free, vegan formulations for sensitive pets.
  4. 3D die printing for rapid prototype shape development.
  5. IoT-connected extruders with predictive maintenance and AI recipe control.

Future factories integrate energy-efficient dryers, servo-driven cutters, and cloud-based process monitoring for higher efficiency and transparency.

Dental chew production combines advanced extrusion technology, material science, and pet nutrition into a single streamlined process.
Manufacturers who master temperature control, moisture balance, and die shaping can create chews that satisfy both veterinary functionality and pet owner expectations.

In the next section, we’ll explore Dog Biscuit Production Lines — a classic yet continuously evolving segment that relies on baking technology, dough rheology, and automation for high-volume output.

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Part 6: Dog Biscuit Production Line

1. Classic Treats Reinvented

Dog biscuits are the origin of modern dog snacks — first industrially produced in the late 19th century as a way to preserve leftover cereal and meat byproducts.
Today, they remain a core product category, evolving from simple baked bones into nutritionally balanced, visually appealing, and highly automated products that appeal to pet owners’ sense of quality and care.

Dog biscuits now come in forms such as:

  • Traditional baked bones
  • Filled biscuits with soft centers
  • Mini crunchy treats for training
  • Functional biscuits fortified with vitamins, glucosamine, or probiotics

Modern biscuit lines integrate continuous mixing, sheeting, baking, cooling, and packaging — capable of producing up to 1–2 tons per hour with high precision and consistency.

2. Biscuit Characteristics and Nutritional Profile

Dog biscuits are low-moisture, baked snacks with crunchy texture and long shelf life.

ParameterTypical RangeDescription
Moisture5–8%Ensures crispness and stability
Protein10–20%Derived from flour and meat powder
Fat5–10%Palatability and flavor
Fiber2–5%Digestive health
Hardness25–50 NIdeal for dental crunch
Shelf life12–24 monthsDue to low water activity

They are generally grain-based, but gluten-free or grain-free variants are increasingly popular.

3. Typical Dog Biscuit Formulation

IngredientFunctionPercentage (%)
Wheat flour / rice flourMain structural base50–60
Meat meal / fish mealProtein source5–10
Vegetable oil / tallowFlavor and energy5–8
Sugar / molassesBrowning and flavor2–4
Salt, calcium carbonateFlavor and minerals0.5–1.0
Leavening agent (baking soda, ammonium carbonate)Crisp texture0.5–1.0
Vitamins & mineralsNutrition0.5
WaterDough consistency15–20

Optional:

  • Milk powder or egg powder for richer flavor
  • Carob powder (safe chocolate alternative)
  • Natural colors / shapes for visual appeal

Final dough consistency must be firm yet pliable, suitable for rotary forming.

4. Process Flow Overview

Ingredient Preparation
   ↓
Mixing & Dough Formation
   ↓
Sheeting & Forming
   ↓
Baking
   ↓
Cooling
   ↓
Oil Spraying (Optional)
   ↓
Packaging

This linear process ensures uniform product quality and is fully compatible with continuous automation systems.

5. Step 1 – Mixing and Dough Preparation

Dry and liquid ingredients are combined to form a cohesive dough.

Equipment:

  • Double-arm sigma mixer or planetary mixer
  • Automatic flour feeder
  • Water/oil dosing pump

Key Parameters:

  • Mixing time: 10–15 min
  • Dough temperature: 20–25°C
  • Moisture: 25–30%

Tip: Avoid overmixing, which develops gluten excessively and causes shrinkage after baking.

For high-volume lines, continuous dough mixers feed directly to the sheeting system, improving efficiency and reducing downtime.

6. Step 2 – Sheeting and Forming

The dough passes through a series of reduction rollers to achieve target thickness (usually 3–8 mm), then cut into desired shapes using rotary molders or cutters.

MachineFunctionSpecification
Rotary cutterCuts biscuits into shapesInterchangeable molds
Rotary molderPresses embossed patternsIdeal for thicker dough
Conveyor transferMoves dough sheetsFood-grade PU belts

Process Control:

  • Sheet thickness tolerance: ±0.1 mm
  • Mold temperature: <30°C (to prevent sticking)
  • Optional flour dusting for release

Common shapes include bones, hearts, paws, circles, and custom brand logos.

7. Step 3 – Baking (Core Stage)

Baking is the most critical operation, converting the raw dough into crisp, aromatic treats through moisture evaporation and Maillard browning.

Baking Systems:

  • Gas-fired tunnel oven (most common)
  • Electric or thermal-oil tunnel oven
  • Hybrid multi-zone oven (for complex control)

Typical Oven Parameters:

ZoneTemperature (°C)Function
Zone 1 (Entrance)160–180Expansion, leavening
Zone 2 (Middle)200–220Browning and structure setting
Zone 3 (Exit)170–180Final drying

Baking time: 10–20 minutes
Target outlet moisture: 5–8%

Airflow direction and belt speed control are essential for uniform coloration. Modern ovens use PLC + PID systems for zone-by-zone temperature regulation.

8. Step 4 – Cooling

After baking, biscuits exit the oven at ~100°C and must be cooled gradually to ambient temperature.

Equipment:

  • Multi-layer cooling conveyor
  • Air-circulation cooling tunnel

Control Points:

  • Cooling time: 10–15 min
  • Target temperature: ≤ ambient +5°C
  • Relative humidity: ≤60%

Rapid cooling prevents “checking” (small surface cracks) and condensation inside packaging.

9. Step 5 – Oil Spraying (Optional)

A thin layer of oil or flavor can be applied to enhance aroma and surface gloss.

Equipment:

  • Rotary drum sprayer or misting system
  • Oil dosage: 0.5–1.5% of product weight
  • Oil temperature: 40–50°C

Coating Options:

  • Chicken oil, beef tallow, or vegetable oil
  • Natural colors (caramel, turmeric)
  • Powder coatings (milk or cheese powder)

After coating, biscuits should rest for a few minutes to allow oil absorption before packaging.

10. Step 6 – Packaging

Automatic packaging systems handle weighing, filling, and sealing with high precision.

Common Formats:

  • Pillow bags (10–200 g)
  • Stand-up pouches (100–500 g)
  • Bulk packs (1–10 kg for B2B)

Packaging Machines:

  • Vertical Form Fill Seal (VFFS)
  • Horizontal flow wrap machine
  • Multi-head weigher for dosing

Options:

  • Nitrogen flushing for freshness
  • Zip-lock or resealable pouches
  • QR codes for traceability

Storage Conditions:
15–25°C, RH ≤ 60%, shelf life up to 18–24 months.

11. Equipment Configuration Example (500–1,000 kg/h Line)

SectionEquipmentFunction
MixingSigma mixer / continuous mixerDough formation
Sheeting3–5 roller stationsThickness reduction
FormingRotary cutter / molderShape forming
Baking30–60 m tunnel ovenMoisture removal
CoolingMulti-layer belt coolerTemperature stabilization
SprayingRotary drum sprayerOil coating
PackagingVFFS + nitrogenFinal sealing

Power: 100–150 kW
Factory length: 30–40 m
Operators: 3–5 persons

Fully automated systems can include automatic scrap recycling, inline metal detection, and vision inspection for quality assurance.

12. Quality Control & Testing

ParameterMethodTarget
MoistureOven test5–8%
HardnessTexture analyzer25–50 N
Color uniformityVisual / optical sensorEven
Microbial safetyTotal plate count≤ 1×10⁴ cfu/g
Shape integrityDrop test<2% broken

Regular calibration of ovens and temperature sensors is critical to consistent performance.

13. Common Defects and Remedies

ProblemCauseSolution
Pale colorLow baking temperatureIncrease mid-zone temperature
Burnt edgesOven imbalanceAdjust air distribution
CracksOver-baking / low humidityLower temperature or add humectant
Sticky surfaceExcess sugar or oilReduce syrup level
Uneven thicknessRoller misalignmentAdjust roller gap

Proper preventive maintenance keeps the line stable and energy-efficient.

14. Innovation Trends in Dog Biscuits

  1. Functional biscuits with added probiotics, collagen, or herbal extracts.
  2. Grain-free recipes using chickpea, sweet potato, or tapioca flour.
  3. 3D-printed molds for custom shapes and branding.
  4. Sustainable packaging (biodegradable or recyclable films).
  5. Energy recovery systems from oven exhaust for green manufacturing.

These innovations enhance market competitiveness while aligning with sustainability goals.

The dog biscuit production line combines traditional baking craftsmanship with modern automation and quality control.
It remains one of the most cost-efficient and versatile snack lines, ideal for both entry-level and large-scale pet food factories.

In the next section, we’ll examine two specialized but fast-growing categories — Soft/Moist Treats and Rawhide Bone Production Lines — highlighting their unique formulations, drying systems, and processing challenges.

Part 7: Soft/Moist Treats & Rawhide Bone Production Lines

1.Expanding Beyond the Classics

While jerky, dental chews, and biscuits dominate traditional snack markets, soft/moist treats and rawhide bones are increasingly popular for their unique textures and functional purposes.

  • Soft treats cater to small dogs, senior pets, and training uses — offering tenderness, aroma, and easy digestibility.
  • Rawhide bones, on the other hand, are long-lasting chewing snacks designed to occupy dogs while cleaning their teeth.

These two product categories highlight diversity in processing: one relies on moisture retention and humectants, while the other demands rigid drying and mechanical shaping.

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Section A: Soft / Moist Dog Treats Production Line

2. Product Characteristics

Soft or semi-moist dog treats contain higher water activity than baked or extruded snacks, yet remain shelf-stable due to humectants like glycerin or sorbitol. They provide chewy, flexible texture and high palatability.

ParameterTypical RangeFunctional Role
Moisture20–30%Softness and chewability
Water Activity (aw)≤0.85Microbial stability
Protein20–35%Nutritional value
Fat5–8%Palatability
Shelf Life6–12 monthsControlled by humectants

Soft treats bridge the gap between jerky (low moisture) and canned pet food (high moisture).

3. Formulation Principles

IngredientFunctionPercentage (%)
Meat paste or fishProtein matrix40–50
Wheat gluten / soy proteinElasticity8–12
Starch (potato, tapioca)Binder, structure10–15
Glycerin / sorbitolMoisture control5–10
Oil / fatFlavor and energy3–5
Preservatives (sorbate, benzoate)Shelf life extension0.3–0.5
Flavorings / smoke extractAroma enhancement0.5–1.0

The key is to retain softness while preventing microbial spoilage, which requires precise control of water activity and humectant ratios.

4. Soft Treat Production Flow

Raw Material Preparation
   ↓
Mixing & Emulsification
   ↓
Extrusion / Forming
   ↓
Steam Cooking or Low-Temp Baking
   ↓
Cooling
   ↓
Oil / Flavor Coating
   ↓
Packaging

5. Step 1 – Mixing & Emulsification

Raw meat or plant proteins are mixed with starches, glycerin, and seasonings to form a homogeneous dough.

Equipment:

  • Vacuum meat mixer
  • Emulsifier or colloid mill

Key Controls:

  • Mixing time: 10–15 min
  • Vacuum: -0.08 MPa (to remove air)
  • Temperature: ≤12°C

Homogeneity ensures even cooking and uniform texture.

6. Step 2 – Extrusion or Forming

The mixed mass is formed into desired shapes (sticks, cubes, or ribbons) using:

MethodEquipmentNotes
Single-screw extruderSimple shapes, low-cost20–30% moisture feed
Hydraulic forming machineFor irregular or filled shapesMaintains texture
Co-extrusion systemFor filled treats (e.g., chicken outside, cheese inside)Two-component extrusion

Forming temperature: 30–50°C
Die temperature: 60–80°C

7. Step 3 – Cooking / Baking

Soft treats are cooked at lower temperatures than biscuits or jerky to retain tenderness.

Cooking Options:

  • Steam chamber – gentle cooking, preserves juiciness
  • Low-temperature baking – 100–130°C, 15–30 min

Objectives:

  • Achieve internal coagulation of proteins
  • Partial dehydration (final moisture 20–30%)
  • Maintain bright color and aroma

Tip: Avoid overcooking, which makes treats hard or brittle.

8. Step 4 – Cooling and Coating

After cooking, the product is cooled to prevent condensation and surface stickiness.
Then, a thin coating of oil or palatant is applied.

Coating Additives:

  • Chicken oil / liver oil (for aroma)
  • Glycerin / malt syrup (surface gloss)
  • Natural smoke flavor

Cooling: 15–20 minutes to ≤ ambient +5°C.

9. Step 5 – Packaging

Soft treats are highly moisture-sensitive; packaging must provide oxygen and moisture barriers.

Packaging Systems:

  • Nitrogen-flushed pillow bags
  • Resealable pouches
  • Small sachets for portion control

Film Types: PET/AL/PE or high-barrier mono films.
Storage: 15–25°C, RH ≤ 55%, away from sunlight.

Optional: pasteurization-in-pack for extended shelf life.

10. Quality Control (Soft Treats)

ParameterTargetMethod
Moisture20–30%Oven drying
aw (water activity)≤0.85Hygrometer
Protein≥25%Kjeldahl
Microbial load<10⁴ cfu/gMicrobiological assay
Hardness5–15 NTexture analyzer

Maintaining precise aw ensures both softness and safety.

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Section B: Rawhide Bone Production Line

auto rawhide bone pressing line (1)
auto rawhide bone pressing line (1)

11. Product Overview

Rawhide bones are long-lasting chewing snacks made from defatted cattle or pig hides. They are non-nutritive but satisfy dogs’ natural chewing instincts, aiding dental hygiene and stress relief.

The process is mechanical rather than cooking-based — involving soaking, cleaning, shaping, drying, and pressing.

AttributeValue
Moisture8–12%
HardnessVery high
Shelf life18–24 months
Chew duration30–90 minutes

12. Rawhide Bone Production Flow

Rawhide Sourcing
   ↓
Soaking & Cleaning
   ↓
Splitting & Trimming
   ↓
Shaping (Rolling / Knotting)
   ↓
Drying
   ↓
Pressing & Polishing
   ↓
Coating (Optional)
   ↓
Packaging

13. Step 1 – Rawhide Preparation

Rawhide (usually cowhide) is sourced from tanneries or slaughterhouses, pretreated for food-grade use.

Processes:

  • Soaking in lime solution (1–3%) to loosen hair
  • Dehairing and neutralization in weak acid bath (1–2%)
  • Rinsing thoroughly in potable water

Key Requirements:

  • pH neutrality (6.5–7.0)
  • Removal of fats and residues
  • Uniform thickness (2–4 mm)

14. Step 2 – Splitting, Cutting & Shaping

Clean hides are cut into strips and shaped into various formats:

  • Knotted bones (classic)
  • Pressed sheets
  • Twisted sticks

Equipment:

  • Cutting machine
  • Hydraulic press / bone former
  • Rolling and knotting machine

Manual adjustment ensures tight knots and consistent shape.

15. Step 3 – Drying

Drying stabilizes the product and prevents mold.

Methods:

  • Natural drying: 2–3 days at 25–35°C
  • Hot-air drying: 40–70°C for 12–36 hours

Control:

  • Maintain even airflow
  • Avoid excessive temperature (causes brittleness)
  • Final moisture: 8–12%

Multi-layer belt dryers are often used for industrial-scale lines.

16. Step 4 – Pressing and Polishing

After drying, bones can be hot-pressed into precise shapes, enhancing density and appearance.

Parameters:

  • Press temp: 80–100°C
  • Pressure: 1–3 tons
  • Time: 20–60 seconds

Optional surface polishing gives smooth finish and better appearance.

17. Step 5 – Coating (Optional)

Flavor and color are added through light coating or dipping.

Options:

  • Chicken / beef flavor dips
  • Caramel or natural colorant spray
  • Smoke essence coating

Final drying: 50–60°C for 1–2 hours.

18. Step 6 – Packaging

Because rawhide bones are low in moisture, standard pillow bags or bulk boxes suffice.
Packaging should protect against humidity and contamination.

Specifications:

  • Small bones: 50–200 g per bag
  • Large chews: 0.5–2 kg bulk bags
  • Vacuum packaging for premium lines

Storage conditions: 15–25°C, RH ≤ 60%.

19. Equipment Configuration Example (Rawhide Line 200–400 kg/day)

SectionEquipmentFunction
SoakingSoaking tanksHydration & cleaning
SplittingHide splitting machineUniform thickness
ShapingHydraulic pressBone forming
DryingMulti-layer dryerDehydration
CoatingFlavor sprayerOptional coating
PackagingVFFS / manual packBag sealing

Power: 30–50 kW
Labor: 4–6 workers

20. Innovation Trends

  1. Collagen-based rawhide substitutes (digestible alternatives).
  2. Dual-layer chews combining rawhide + meat coating.
  3. Low-temperature enzymatic tanning for eco-friendly processing.
  4. Custom 3D pressing dies for brand differentiation.
  5. Smart humidity-controlled dryers to prevent mold.

These advancements enhance safety, sustainability, and aesthetic appeal.

Soft treats and rawhide bones demonstrate the breadth of pet snack manufacturing technology — from moisture-controlled soft lines to mechanically intensive bone lines.
Both require distinct expertise: precise humidity control for soft treats, and careful drying mechanics for rawhide stability.

Together, they complete the spectrum of dog snack categories, giving manufacturers a full portfolio to serve every market segment — from training rewards to long-lasting chews.

Part 8: Equipment Layout, Automation, Quality Control & Future Trends

auto rawhide bone pressing line 1
auto rawhide bone pressing line 1

1. From Machinery to Manufacturing System

The success of a dog snack production facility depends not only on product recipes or equipment specifications, but on integrated system design — how machines, utilities, automation, and hygiene zones interact.

Modern factories are designed as continuous, traceable, and digitally connected ecosystems that minimize human contact, maximize yield, and comply with global food safety standards (FDA, FSSC 22000, ISO 9001, CE, etc.).

This final part outlines how to plan, control, and evolve a professional dog snack plant from mechanical assembly to Industry 4.0 automation.

2. Factory Layout Planning

A well-designed layout optimizes material flow, hygiene separation, energy use, and operator safety.

2.1 Typical Layout Zones

Raw Material Receiving → Storage (Dry / Cold)
    ↓
Preparation & Mixing Zone
    ↓
Forming / Extrusion Zone
    ↓
Thermal Processing (Baking / Drying / Cooling)
    ↓
Coating & Packaging
    ↓
Finished Goods Warehouse

Each zone should have controlled air pressure differentials (positive for cooked zones, negative for raw) to prevent cross-contamination.

2.2 Material Flow Principles

  • Raw materials move forward only, never cross back.
  • Waste and by-products exit through separate routes.
  • Personnel movement restricted by hygiene gates (boot wash, hand sanitizer).
  • Utilities (steam, compressed air, electrical) routed overhead for maintenance access.

2.3 Space Allocation (for 500–800 kg/h Line)

AreaRecommended SizeNotes
Raw material & mixing150 m²Dry + wet ingredient zones
Extrusion / forming100 m²Controlled temperature
Drying & baking200 m²Long continuous lines
Cooling & packaging120 m²Low humidity
QC laboratory30 m²Sampling & testing
Warehouse300 m²FIFO (first-in, first-out) system

Proper zoning reduces contamination risks and improves production efficiency by up to 20%.

3. Utility & Infrastructure Requirements

UtilityTypical Demand (500 kg/h Line)Notes
Electric power120–150 kWDrives, heaters, conveyors
Steam400–600 kg/hCooking, preconditioning
Compressed air0.6–0.8 MPaValves, cutters, packaging
Water1.5–2 m³/hMixing, cleaning
Ventilation / exhaust10–15 air changes/hrDryer & oven exhaust
Chilled waterOptionalCooling tunnels

Utility lines should include flow meters and safety interlocks for energy optimization.

4. Automation and Control Systems

Automation defines modern competitiveness. It ensures precision, repeatability, traceability, and real-time quality assurance.

4.1 PLC–HMI Control Platform

Each production line is integrated with a PLC (Programmable Logic Controller) and HMI (Human-Machine Interface).

Functions:

  • Real-time monitoring of temperature, moisture, torque, speed
  • Auto-start/stop sequencing
  • Recipe storage and recall
  • Alarm logs and maintenance reminders

4.2 SCADA / MES Integration

For larger factories, SCADA (Supervisory Control and Data Acquisition) or MES (Manufacturing Execution System) links multiple lines and records every batch parameter (feed rate, drying curve, product lot).
This enables:

  • Full product traceability
  • Energy usage analysis
  • Predictive maintenance scheduling

4.3 Smart Sensors & IoT

  • Temperature and humidity sensors inside dryers
  • Load cells for real-time material consumption
  • Vision systems for color and shape inspection
  • Cloud connectivity for remote diagnostics

Automation reduces human error, improves hygiene, and provides data for continuous improvement.

5. Quality Control Framework

Quality assurance (QA) begins with ingredient inspection and continues until the final bag leaves the factory.

5.1 Incoming Material Control

  • Meat / starch testing: moisture, protein, microbial load
  • Packaging film inspection: thickness, sealing strength
  • Supplier audit system for certification compliance

5.2 In-Process Quality Control

StageParameterTesting MethodFrequency
MixingHomogeneityVisual / sample testEvery batch
ExtrusionMoisture, torqueInline sensorsContinuous
DryingOutlet moistureInfrared sensorHourly
PackagingSeal integrityLeak testEvery 30 min

5.3 Finished Product Control

  • Microbiological tests: total plate count, Salmonella, E. coli
  • Chemical tests: moisture, protein, fat, ash
  • Physical tests: hardness, elasticity, color
  • Shelf-life tests: accelerated storage at 40 °C, 75 % RH

All results are recorded digitally in a Batch Manufacturing Record (BMR) for traceability.

6. Food Safety & Compliance

Modern pet treat factories must adhere to human-food-grade standards.

6.1 Core Systems

  • HACCP (Hazard Analysis and Critical Control Points)
  • ISO 22000 / FSSC 22000 food safety certification
  • GMP (Good Manufacturing Practice) design
  • BRC / FDA registration for export markets

6.2 Critical Control Points (CCPs)

  1. Thermal processing — kill-step validation (≥90 °C for >10 min).
  2. Metal detection — at packaging outlet.
  3. Moisture & aw control — prevents mold growth.
  4. Cleaning validation — swab tests post-CIP.

6.3 Sanitation Program

  • CIP (Clean-in-Place) for mixers, extruders, dryers
  • Daily sanitation log
  • Detergents verified as food-grade, non-residual

Compliance not only prevents recalls but also enhances brand reputation internationally.

7. Energy Efficiency and Sustainability

Sustainability is now a strategic advantage.

Key measures:

  • Heat recovery systems on dryer exhausts (up to 25 % energy saving)
  • LED lighting and variable-frequency drives (VFDs)
  • Water recycling from CIP rinse stages
  • Biogas or biomass boilers replacing fossil fuels
  • Eco-friendly packaging (recyclable mono-PE, paper-laminated films)

Environmental reporting aligns with ESG (Environmental, Social, and Governance) standards, attracting global partners.

8. Maintenance and Lifecycle Management

8.1 Preventive Maintenance Schedule

EquipmentIntervalTask
Extruder screwsEvery 1 000 hInspect wear, replace if >0.3 mm gap
Dryer fansMonthlyClean blades, check bearings
MixersWeeklyVerify shaft seals
Packaging machineDailyCalibrate seal temperature

8.2 Spare Parts & Support

Maintain an inventory of critical spares: heating elements, sensors, bearings, PLC cards.
Manufacturers like Darin Machinery provide remote diagnostic service, video troubleshooting, and on-site training.

9. Example: Integrated Dog Snack Factory Layout (1 000 kg/h)

Main Features:

  • Two parallel extrusion lines (Dental + Soft Treats)
  • One baking line (Biscuits)
  • Shared multi-layer dryers with zoned control
  • Central oil-spray and packaging area
  • Automated conveying between zones

Layout Flow (simplified):

[Raw Material Room]
      ↓
[Mixer → Preconditioner]
      ↓
[Extruder Line A] → Dryer → Coater → Packer
[Extruder Line B] → Dryer → Coater → Packer
      ↓
[Finished Warehouse]

Material flow, utilities, and operator circulation are all unidirectional, with stainless-steel drains and epoxy floors.

10. Digital Transformation & Industry 4.0

Next-generation dog snack plants are becoming smart factories, merging AI, data analytics, and robotics.

Emerging Technologies:

  • AI-driven recipe optimization — adjusts screw speed and moisture based on product quality feedback.
  • Predictive maintenance — sensors detect vibration or torque anomalies.
  • Collaborative robots (cobots) — assist in packing and palletizing.
  • Cloud dashboards — allow global remote monitoring of multiple factories.

These systems reduce downtime, optimize resources, and provide traceable data for every batch.

11. Global Market Trends & Future Outlook

  1. Functional Treats Boom: Snacks fortified with probiotics, collagen, or joint supplements will dominate growth.
  2. Human-grade and “Clean Label” Movement: Transparency in sourcing and minimal additive use become purchasing drivers.
  3. Plant-based Pet Snacks: Pea, rice, and insect proteins replacing meat for sustainability.
  4. Regional Customization: Duck-based treats in Asia, beef in the Americas, fish in Nordic markets.
  5. Automation + Robotics: Labor-saving imperative amid global workforce shortages.
  6. Regenerative Manufacturing: Carbon-neutral production lines and renewable energy adoption.

Manufacturers combining innovation, flexibility, and sustainability will lead the next decade of pet treat evolution.

12. Building a World-Class Dog Snack Factory

A modern dog snack production line is far more than a collection of machines — it is a systematic integration of process engineering, automation, and food safety.
Success depends on four pillars:

  1. Scientific formulation based on nutritional and process compatibility.
  2. Optimized process design with reliable, energy-efficient equipment.
  3. Comprehensive automation ensuring consistency and traceability.
  4. Quality and compliance management aligning with global standards.

By mastering these aspects, manufacturers can deliver high-quality, export-ready dog snacks — from jerky and dental chews to biscuits, soft treats, and rawhide bones — meeting the rising expectations of pet owners worldwide.

Contact Us

For companies seeking to establish or upgrade a dog snack production facility, partnering with an experienced machinery provider such as Darin Machinery offers a proven path to success.
Darin delivers complete turnkey solutions — from plant layout design and equipment manufacturing to installation, operator training, and after-sales support — ensuring every client achieves efficient, compliant, and profitable production.

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Top-Selling Pet Food Machinery

Looking for high-performance pet food machinery? Discover Darin’s best-selling machines, trusted by customers worldwide. From automatic extrusion lines to innovative treat shaping machines, we offer professional solutions to boost your production.
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Pet Food Extruder
Equipped with two intermeshing screws. Offers powerful mixing, higher flexibility, and stable output. Ideal for complex formulations, high-fat, or high-moisture recipes. Higher cost and more complex maintenance.
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Twin Screw Extruder
Equipped with two intermeshing screws. Offers powerful mixing, higher flexibility, and stable output. Ideal for complex formulations, high-fat, or high-moisture recipes. Higher cost and more complex maintenance.
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Small-scale Mini Laboratory Extruder

Capacity < 500 kg/h. Suitable for small businesses, startups, or R&D purposes.

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Large-scale Industrial Extruder

Capacity > 2,000 kg/h. Designed for large-scale pet food brands and export-oriented factories.

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Fish Feed Extruder

Designed to produce floating or sinking fish feed.

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Dog Food Machine

Optimized for dog food formulations and kibble shapes.

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