Poultry slaughter

🧠 Criteria for a Good Slaughter Method

Must:

• Prevent cruelty

• Avoid unnecessary stress

• Ensure rapid, complete bleeding

• Minimize carcass damage

• Be:

  • Hygienic

  • Economical

Safe for workers

🏭 Overview of Poultry Production

Ages at Processing

• Broilers (chickens): 5–9 weeks old

• Turkeys: 19–21 weeks old

Large plants may process:

• ~250,000 chickens/day (video example)

Plants located near farms → reduces transport stress.

🔁 7 Major Steps in Poultry Slaughter

1. Ante-mortem inspection

2. Shackling & stunning

3. Exsanguination (bleeding)

4. Feather removal

5. Evisceration + post-mortem inspection

6. Washing & chilling

7. Final carcass preparation

1⃣ Ante-Mortem Inspection

Performed within 24 hours prior to slaughter.

Inspectors check:

• Disease (including zoonosis)

• Bird condition

• Proper accommodation

• Humane handling

Environmental Management (Video Examples)

Hot weather:

• Fans

• Misting systems

• Open-sided trailers

Cold weather:

• Fiberglass side panels on trucks

Dim lighting:

• Keeps birds calm

Birds on good farms are accustomed to people walking through barns

2⃣ Shackling & Stunning

Shackling

• Birds hung upside down on automated line

• Done in dark/dim room to relax birds

• Turkeys may be shackled directly off truck

Stunning Methods (2 Major Types)A) Electrical Stunning

• Birds pass through water bath

• Electrical current flows:

  • From head → through body → shackle

• Must induce epileptiform brain activity

• Minimum current depends on species/size

• Causes immediate unconsciousness

After stun:

• Some twitching normal

• NO blinking allowed

• Head must be limp

B) Controlled Atmosphere Stunning (CAS)

• Uses CO₂ or inert gases

• Reduces oxygen

• Gradual CO₂ rise required (poultry sensitive)

• Turkeys must have slower increase than pigs

Advantages:

• Less handling

• Less injury

• Better welfare

Modular systems:

• Broilers transported in drawers/modules

• Entire module placed into CAS

• Reduces manual handling

Both methods considered humane by:

• USDA

• OIE

• Avian Pathologists

3⃣ Exsanguination (Bleeding)

Primary cause of death = blood loss.

Steps:

• Automated blade cuts neck arteries

• Backup worker ensures all birds cut

• Live birds MUST NOT enter scald tank

Bird hangs upside down → gravity assists blood drainage

4⃣ Feather Removal

Birds do NOT have hide or pelt.

Step 1: Scalding

• Hot water loosens feathers

• Temperature varies by species/age

Step 2: Picking

• Rubber finger picker machine

• Rotating rubber fingers remove feathers

• Employees remove remaining feathers

5⃣ Evisceration + Post-Mortem Inspection

Poultry evisceration often highly automated (especially broilers).

Turkeys:

• More manual (larger size)

Unique Bird Anatomy (VERY TESTABLE)Oil Gland (Uropygial gland)

• Located at base of tail

• Must be removed

• Produces oil for:

  • Waterproofing

  • Antimicrobial action

  • Vitamin D precursor production

General Evisceration Steps

1. Remove oil gland

2. Neck incision

3. Remove crop & trachea

4. Incision around cloaca

5. Remove viscera intact

6. Remove liver (avoid bile contamination)

7. Open gizzard & discard contents

8. Remove heart

9. Remove lungs, kidneys, reproductive organs

10. Remove head, neck, feet

11. Chill carcass

12. Pack giblets (if included)

Edible Organs (Giblets)

• Gizzard

• Liver

• Heart

• Neck (often included)

Inedible:

• Spleen

• Esophagus

• Lungs

• Intestines

Reproductive organs

USDA Inspection

Federal inspectors:

• On duty at all times

• Inspect EVERY bird

• Can halt production if issue found

Microbial testing:

• Salmonella

• Campylobacter

• E. coli

Quality checks:

• Broken wings

• Bruising

• Stunning efficacy

6⃣ Washing & Chilling

Carcasses washed thoroughly.

Antimicrobial rinses may be used:

• FDA-approved food grade agent

Chilling MethodsA) Water Bath Chilling

• Turkeys: ~5 hours

• Broilers: 1–2 hours

B) Air Chilling

Requirement:

• Reach <4°C within required time (weight dependent)

Chilling reduces bacterial growth

7⃣ Final Carcass Preparation

Includes:

• Sorting by weight

• Grading

• Deboning

• Cutting into parts:

  • Wings

  • Drumsticks

  • Breasts

  • Thighs

Packaging:

• Bagged or boxed

• USDA seal required before shipping

• Refrigerated transport

🧼 Sanitation

• 8-hour sanitation shift daily

• Full equipment wash-down

• Approved disinfectants used

• Federal inspection before restart

Carcass testing:

• Swabs (red meat)

• Broth rinse method (poultry bag sample)

Measure:

• Qualitative microbial counts

• Quantitative microbial counts

🔥 Consumer Food Safety (From Video)

Consumers must:

• Clean (wash hands/surfaces)

• Separate (avoid cross-contamination)

• Cook to 165°F (74°C) internal temp

• Chill promptly