Laying Hen Colony Cage Welfare Assessment

Colony cage systems for laying hens remain controversial, with evidence on welfare outcomes compared to cage-free systems.

Key Facts

Colony cages provide more space than conventional cages but less than cage-free systems
Keel bone fracture rates in colony cages vary but can be lower than in some cage-free aviaries
Welfare outcomes in colony cages depend heavily on flock size, design specifics, and management
EU regulations are progressively moving toward cage-free requirements
Consumer pressure has driven cage-free commitments from major retailers and food companies

Welfare Considerations

Colony cage welfare is a contested area where the evidence is more nuanced than simple cage-free versus caged comparisons. Some colony cage designs achieve better outcomes than poorly managed cage-free systems on specific metrics. However, the behavioral restriction of colony cages - particularly for dustbathing and nesting - represents a genuine welfare deficit compared to well-managed cage-free systems. Welfare assessment should be based on outcomes rather than system type alone.

What You Can Do

Support the cage-free transition commitments made by major food companies
Advocate for animal-based welfare measurement rather than cage-type as the primary welfare indicator
Learn about the welfare evidence comparing colony cage and cage-free laying hen systems