Colony Cages for Laying Hens — A Welfare Assessment

Colony cages replaced conventional battery cages in the EU in 2012 but remain controversial as an inadequate welfare improvement.

Key Facts

Colony cages provide 750 cm2 per hen versus 550 cm2 in conventional battery cages
Colony cages must include a nest box, perch, and scratch area by EU law
Hens in colony cages cannot perform dustbathing as cages do not provide substrate
Cage-free systems provide more space but have different welfare trade-offs
The EU is reviewing the 2012 colony cage standards as part of the Farm to Fork strategy

Welfare Considerations

Colony cages represent a partial improvement over conventional battery cages but do not provide adequate welfare for laying hens. The mandated perches are often too narrow and incorrectly positioned for natural resting. Nest boxes are frequently shared among too many hens, creating competition. Scratch areas lack sufficient substrate for dustbathing motivation to be satisfied. The welfare benefit of colony over conventional cages is real but modest — they remain fundamentally restrictive environments.

What You Can Do

Choose genuinely cage-free or free-range eggs rather than colony cage products
Support campaigns for a complete phase-out of all cage systems
Learn the differences between egg labelling systems and their welfare implications
Advocate for cage-free requirements in food company procurement policies
Support research into genuinely welfare-positive egg production systems at scale