Egg Laying Hen Enriched Colony Welfare

Enriched colony cages were introduced as a welfare improvement over battery cages, but evidence suggests they still fail to meet many key behavioural needs of laying hens.

Key Facts

Enriched colonies are banned in most EU member states following the 2012 battery cage ban
Enriched colonies provide approximately 750 square centimetres per hen plus nest boxes, perches, and scratch areas
Research shows perch use in enriched colonies is limited by inadequate space for simultaneous use
Keel bone fractures affect 50-80% of laying hens in enriched colony systems due to falls from perches
Dust bathing behaviour is frustrated in enriched systems as substrate provision is minimal
Barn and free-range systems allow better expression of natural behaviour but have higher keel bone fracture rates from falls

Welfare Considerations

Enriched colony cages represent an improvement over conventional battery cages but remain inadequate for the full expression of hen behavioural needs. The provision of nest boxes, scratch areas, and perches acknowledges that hens have these needs but provides them in such limited form that the behaviours cannot be properly expressed. Keel bone fractures are now recognised as the most significant welfare problem across all laying hen housing systems, affecting the majority of hens regardless of system type. No current commercial laying system has fully resolved the keel bone fracture problem, making this a priority research and management area.

What You Can Do

Choose free-range or organic eggs from certified higher-welfare schemes requiring outdoor access
Support research into keel bone fracture prevention across all laying hen housing systems
Advocate for the phase-out of enriched colony systems in favour of cage-free alternatives
Ask egg producers about their keel bone fracture monitoring and prevention strategies
Reduce egg consumption or shift entirely to certified higher-welfare sources