Poultry Welfare

Aggression in Laying Hens: Causes and Prevention

Feather pecking and cannibalism in laying hens are significant welfare problems driven by stocking density, boredom, and management failures.

Key Facts

Feather pecking can escalate to cannibalism causing severe injury and death in flocks
Severe feather pecking affects up to 80% of flocks in some production systems
High stocking density, poor enrichment, and inadequate feeding space are key risk factors
Dim lighting reduces pecking behavior but may also reduce positive welfare states
Genetic selection for reduced fearfulness and pecking tendency is being developed

Welfare Considerations

Injurious pecking is a welfare crisis in laying hen production that reflects systemic failures in housing, management, and genetics rather than inevitable bird behavior. Addressing root causes through better enrichment, lower stocking density, and appropriate lighting creates lasting welfare improvement. Beak trimming as the primary solution treats symptoms rather than causes and imposes its own welfare cost.

What You Can Do

Choose eggs from systems with lower stocking densities and better enrichment
Support campaigns for root-cause management of pecking rather than beak trimming
Advocate for stocking density limits based on welfare science
Donate to research into pecking prevention through genetic and management approaches