04/08/2026
Cannibalism in poultry is a behavioral problem where birds peck at and injure or kill other birds. It usually results from a combination of environmental, nutritional, and management factors rather than a single cause.
Common causes include:
Overcrowding: Too many birds in a small space increases stress, aggression, and pecking.
Bright or continuous lighting: Very bright light or excessively long light periods can make birds more active and aggressive.
Nutritional deficiencies: Inadequate protein, essential amino acids (such as methionine), sodium, or other nutrients can contribute to feather pecking and cannibalism.
Insufficient feeder or drinker space: Competition for food and water increases aggressive behavior.
Heat stress or poor ventilation: High temperatures and poor air quality make birds irritable and stressed.
Boredom or lack of enrichment: Birds kept in barren environments may begin pecking each other.
Visible blood or wounds: Once birds notice blood or exposed tissue, they may continue pecking, causing severe injuries.
Mixing unfamiliar birds: Introducing new birds disrupts the social hierarchy and can trigger aggression.
Disease or injury: Sick, weak, or injured birds are often targeted by healthy flock members.
Genetics: Some breeds or strains are naturally more prone to aggressive pecking than others.
How to prevent cannibalism
Maintain the recommended stocking density.
Provide a balanced diet with adequate protein, minerals, and vitamins.
Ensure enough feeders and drinkers for all birds.
Use appropriate light intensity (avoid excessively bright lighting).
Remove or treat injured birds promptly.
Keep the house well ventilated and at a comfortable temperature.
Provide environmental enrichment, such as pecking blocks, straw, or perches where appropriate.
Avoid sudden management changes and minimize stress.
In areas where it is permitted and considered necessary, beak trimming by trained personnel may reduce severe cannibalism, though good management should always be the primary strategy.
Early signs include feather pecking, missing feathers around the tail or vent, skin injuries, and birds avoiding certain flock mates. Addressing these signs quickly can prevent escalation into severe cannibalism.