Egg and Meat Production Js 2 Note

JSS 2 LIVESTOCK FARMING LESSON NOTE

FIRST TERM | WEEK 4: EGG AND MEAT PRODUCTION

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1. Egg Handling, Processing, and Storage

Egg processing involves all the practices carried out from the moment an egg is laid until it reaches the final consumer to maintain freshness, quality, and market value.

Steps in Egg Handling:

1. Collection: Collect eggs at least 2 to 3 times daily (morning, mid-day, late afternoon) to prevent egg eating by hens, breakage, or contamination with manure.
2. Cleaning: Lightly soiled eggs are dry-cleaned using sandpaper or a clean damp cloth. Avoid washing eggs in cold untreated water, as this forces bacteria (like Salmonella) into the egg pores.
3. Candling: Holding eggs over a bright light source in a darkened room to inspect internal quality.
   • Checks for: Shell cracks, air cell size, yolk position, and presence of blood or meat spots.
4. Grading: Grouping eggs based on weight, shell quality, and size (e.g., Small, Medium, Large, Extra Large).
5. Packaging: Placing eggs broad-end (large end) UP in clean paper or plastic egg trays/crates. The broad end contains the air cell, keeping the yolk centered.
6. Storage: Store eggs in a cool, well-ventilated room at 10°C – 15°C with a relative humidity of 70%–80% away from strong-smelling items.

2. Slaughtering and Dressing of Poultry Birds

Processing broilers or culled layers for meat involves sequential, hygienic operations to prepare carcass meat for consumption or sale.

Stage	Description & Procedure
1. Fasting	Withhold feed for 8–12 hours before slaughter (while providing clean water) to empty the crop and intestines, minimizing fecal contamination during dressing.
2. Slaughtering & Bleeding	Sever the jugular vein and carotid artery at the throat using a sharp knife. Allow complete bleeding for 1.5–2 minutes to ensure high carcass quality.
3. Scalding	Immerse the bled bird in hot water at 58°C–62°C for 30–60 seconds to loosen feather follicles for easy plucking.
4. Defeathering (Plucking)	Remove all feathers manually or using a mechanical plucking machine immediately after scalding.
5. Evisceration (Gutting)	Cut around the vent and remove all internal viscera (guts, liver, heart, gizzard, lungs). Separate edible giblets (liver, heart, cleaned gizzard) from non-edible offal.
6. Washing & Chilling	Wash the carcass thoroughly with clean, cold chlorinated water. Chill in ice water or a refrigerator (<4°C) to stop bacterial growth.

3. Hygiene Rules in Handling Egg and Poultry Meat

Maintaining strict hygiene prevents food poisoning (such as Salmonella and Campylobacter infections) and ensures product shelf life.

• Water Sanitation: Always use drinkable, chlorinated water for washing carcasses and equipment.
• Equipment Sterilization: Clean and sanitize knives, slaughter cones, cutting tables, and trays before and after processing.
• Personal Hygiene: Workers must wear clean aprons, hair nets, and rubber gloves, and wash hands thoroughly.
• Temperature Control: Maintain cold chain storage (refrigeration at 0–4°C or deep freezing at −18°C) for dressed poultry meat.
• Waste Disposal: Dispose of feathers, blood, and inedible offal immediately by deep burial or incineration to keep flies and pests away.

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CLASS EVALUATION & REVISION QUESTIONS

1. Why should eggs be packed with their broad ends facing up?
2. Explain the term "candling" in egg processing.
3. Why is it necessary to withhold feed from poultry birds for 8–12 hours before slaughter?
4. Distinguish between scalding and evisceration in poultry dressing.
5. List four hygienic measures required when processing poultry meat for sale.

HOME ASSIGNMENT:
Draw a simple flow diagram in your notebook illustrating the six main steps involved in dressing a poultry bird from live bird to chilled carcass.