Hatchery, Poultry Feed and the Technology Behind Indian Poultry

Overview

A hatchery is a facility where eggs are hatched under artificial conditions, most often of fish or poultry. In a poultry hatchery, incubators keep eggs warm and humid and turn them until chicks hatch at about 21 days. Hatcheries, compound poultry feed, controlled housing and veterinary drugs are the technologies that let commercial poultry grow to scale, and antibiotic use brings the risk of antimicrobial resistance.

Hatchery Meaning and How Poultry Hatcheries Work

What Is a Hatchery? Hatchery Meaning and Types

A hatchery is a facility where eggs are hatched under artificial conditions, especially those of fish, poultry or even turtles. Hatcheries serve two purposes: economic, to enhance food supplies or fishery resources, and conservation, to breed rare or endangered species under controlled conditions.

  • Fish hatcheries: Breed large numbers of fish in an enclosed environment, either to raise for food or aquariums or to release juveniles into rivers, lakes or the sea, a practice called fish stocking.
  • Poultry hatcheries: Produce most of the birds consumed in the developed world, including chickens, turkeys, ducks and geese; some small hatcheries supply backyard keepers and rare breeds.
  • Industrial hatcheries: Produce large numbers of chicks at one time so that birds are uniform in size and can be slaughtered or brought into laying together; a large hatchery produces 15 million chicks a year.
  • Rural hatcheries in India: The National Livestock Mission funds rural hatcheries, with a parent farm and a mother unit, to supply chicks of low input birds.

How a Poultry Hatchery Works: Incubation Period and Egg Incubators

In a poultry hatchery, eggs from parent flocks are cleaned and their shells checked before they go into the incubators. Incubators control temperature and humidity and turn the eggs until just before they hatch; fertile chicken eggs hatch at the end of an incubation period of about 21 days.

Flow: a parent flock lays hatching eggs; eggs are cleaned and shells checked; in the setter they are kept warm and humid and turned; three days before hatching they move to the hatcher, where they are not turned; chicks hatch at about 21 days. The hatching window is 24 to 48 hours; chicks live on their yolk sac until they reach the farm and are often vaccinated when a few days old; a large hatchery produces 15 million chicks a year
  • Setter to hatcher: Three days before hatching, eggs are moved to a hatcher unit, where they are no longer turned.
  • Hatching window: Chicks emerge over 24 to 48 hours; until they reach the rearing farm they rely on their yolk sac for nutrients.
  • Vaccination: Chicks are often vaccinated when a few days old.
  • Humidity matters: If the air is too dry, the egg loses too much water, which can make hatching difficult or impossible.

An incubator simulates a brooding bird by keeping eggs warm within a set temperature range and at the right humidity, with a turning mechanism. The most critical requirement is a steady, consistent temperature throughout incubation. Incubators are also called hatching machines, hatchers or setters.

  • Single-stage incubation: All eggs are of one age, so the climate can be adjusted to what every embryo needs.
  • Multi-stage incubation: The setter holds eggs of usually three to six ages, so the climate is a compromise.
  • History: Egyptians incubated eggs in ovens by 400 BC; Réaumur designed an artificial incubator in the 1740s; Lyman Byce built a coal lamp incubator in 1879, and the first commercial machine came from Hearson in 1881.
  • Scale: Electrically powered incubators with large capacity, such as an early Petersime model holding 15,000 eggs, encouraged large commercial hatcheries.

Poultry Feed: Types, Ingredients and Nutrition

Poultry Feed Types and Ingredients: Mash, Pellets and Crumbles

Before the twentieth century poultry foraged for much of their feed. As flocks grew too large to feed that way, nutritionally complete poultry feed was developed. Modern feed consists largely of grain, protein supplements such as soybean oil meal, mineral supplements and vitamin supplements, and for commercial farms feed is the largest cost.

Feed forms: mash, a ground complete ration; pellets, mash pressed in a pellet mill; crumbles, broken pellets used for chicks; scratch, whole grains fed as an extra. Ingredients: grain, the bulk of the feed; soybean meal for protein, minerals including calcium for layers, and vitamins, with A and K kept high. Feed is the largest cost of commercial poultry farming, and damp feed encourages fungal growth and mycotoxin poisoning
Poultry feed types
Feed form What it is
Mash A nutritionally complete ration in ground form, the earliest complete poultry ration
Pellets Mash compressed and moulded in a pellet mill, so birds cannot pick out single ingredients
Crumbles Pellets broken into granules, often used as chick feed
Scratch grain Whole, cracked or rolled grains scattered on the ground; not a complete ration
  • What decides the ration: The weight and age of the birds, their growth rate, their rate of egg production, the weather and how much they forage.
  • Calcium for layers: A laying hen needs about 4 grams of calcium a day, 2 grams of which go into the egg; oyster shell is a common source.
  • Broilers and vitamins: The broiler ration is protein rich with adequate fat, and vitamins A and K are kept high in poultry feed.
  • Clean and dry: Damp feed encourages fungal growth; mycotoxin poisoning is one of the most common and under-reported causes of poisoning in poultry.

Poultry Housing, Automation and Antibiotic Use

Environment-Controlled Poultry Houses and Automated Feeding

Commercial birds are kept in houses whose environment is controlled. Keeping birds inside protects them from predators, and machinery automates feeding, which cuts cost and lets farms grow in scale.

  • Ventilation: Most new growout houses use tunnel ventilation, in which a bank of fans draws fresh air through the house; some have curtain walls that roll up in good weather.
  • Water and bedding: Because dry bedding of wood chips, rice hulls or peanut shells keeps the flock healthy, most houses use enclosed nipple drinkers that reduce spillage.
  • Light: In egg houses the light phase is lengthened to start laying and then held like a summer day so hens lay all year.
  • Hygiene: Good management keeps temperature and hygiene in housing and feed, and prevents and controls diseases and pests; appropriate vaccination prevents infectious diseases.

Stocking density sets how many birds a house holds. A traditional broiler growout house of 400 to 500 feet by 40 to 50 feet holds about 20,000 birds, about eight-tenths of a square foot per bird, against a recommended minimum of one-half square foot. The larger the bird is grown, the fewer are placed in each house, so that bigger birds get more space.

Antibiotics in Poultry Farming and Antimicrobial Resistance

Poultry producers routinely use approved medicines, such as antibiotics, in feed or drinking water to treat disease or to prevent outbreaks; antibiotics are also fed to livestock as growth supplements. This use is a cause of antimicrobial resistance (AMR).

Antibiotics given in feed or drinking water to treat or prevent disease put selective pressure on bacteria, producing resistant strains in food animals; these spread into food, and manure carries residues into soil, making infections harder to treat. Livestock account for around 73 per cent of global antimicrobial sales; correct drug, dose and duration, and restricting farm use, reduce resistance
  • Main driver: The misuse and overuse of antimicrobials, such as taking them when not needed or taking the wrong type, drive the spread of drug-resistant pathogens; drug-resistant infections also cut farm productivity and threaten food security.
  • How resistance arises: Through spontaneous mutation, horizontal gene transfer and selective pressure from antibiotic overuse in both medicine and agriculture.
  • From farm to people: Antibiotic use in animal husbandry can create resistance in bacteria in food animals; manure carries residual antibiotics into soil when used as fertiliser.
  • In India: Misuse, over-prescription and over-the-counter access to antibiotics have spread resistant superbugs; a Karnataka survey found 80 per cent of drugs sold without prescription.
  • The remedy: The correct drug, dose and duration, strict hospital hygiene, and restricting antibiotic use in farming; the EU banned antibiotics for growth promotion in 2006.

Previous Year UPSC-CSE Questions

Previous Year UPSC-CSE Questions By the end you will be able to draft model answers for the following UPSC questions. Each question carries a collapsible framework showing how to approach it in the exam.

  1. UPSC Prelims 2019 Prelims-GSWhich of the following are the reasons for the occurrence of multi-drug resistance in microbial pathogens in India?
    1. Genetic predisposition of some people
    2. Taking incorrect doses of antibiotics to cure diseases
    3. Using antibiotics in livestock farming
    4. Multiple chronic diseases in some people

    Select the correct answer using the code given below.

    1. a 1 and 2
    2. b 2 and 3 only
    3. c 1, 3 and 4
    4. d 2, 3 and 4
    How to approach this Prelims question

    Question type: Multiple statements

    Approach: Keep only the factors that involve antibiotic use.

    Trap to watch: Genetic predisposition and multiple chronic diseases are not causes of resistance in pathogens.

    Key facts to recall:

    • Selective pressure from overuse in medicine and agriculture
    • Antibiotics in livestock feed and water
    • Correct drug, dose and duration

    Answer signal: 2 and 3 only: option (b).

Sources and Further Reading

Editorial Disclaimer

This article explains hatcheries, poultry feed and related technology from the NCERT Science textbook, Department of Animal Husbandry and Dairying guidelines and the other sources listed below.

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