Poultry Welfare in the UK Cage-Free Transition: Progress and Remaining Challenges

The UK egg industry has undergone a significant cage-free transition, but challenges including keel bone fractures, feather pecking, and mortality rates remain in cage-free systems.

Key Facts

Over 55% of UK eggs are now produced in cage-free systems (free range, barn, or organic)
Conventional enriched colony cages were phased out in the EU by 2012, but many countries still use enriched colony cages
Cage-free systems enable natural behaviors including nesting, perching, and dust bathing, producing better behavioral welfare
Keel bone fractures affect 50-80% of hens in commercial cage-free systems, a major welfare concern
Feather pecking and cannibalism remain challenges in cage-free systems, partly addressed by beak trimming
Mortality rates in cage-free systems can be higher than in enriched colonies if management is poor
The cage-free transition demonstrates that eliminating one welfare problem (movement restriction) can reveal other previously hidden problems

Welfare Considerations

The cage-free transition is welfare progress, but it is not the end of the story. The emergence of keel bone fractures as a major cage-free welfare problem illustrates a broader pattern: eliminating one welfare constraint reveals others that were previously masked. Hens that cannot move cannot break their keels jumping from perches; when they can move, the design of that movement environment becomes critical. The cage-free welfare challenge is to make the full movement environment - including perch design, spacing, height, and approach angles - genuinely welfare-positive rather than simply removing the cage. This requires ongoing research, monitoring, and willingness to modify system design based on welfare evidence, treating cage-free as a beginning rather than an endpoint.

What You Can Do

Choose free-range or organic eggs when possible, as these systems tend to have better welfare outcomes than basic barn systems
Ask egg producers and retailers whether their cage-free systems monitor keel bone fracture rates as a welfare indicator
Support research into cage-free system design that reduces keel bone fractures while maintaining behavioral welfare benefits
Advocate for keel bone monitoring to be included in egg welfare certification standards
Reduce total egg consumption or switch to plant-based alternatives as a complementary strategy alongside welfare improvement advocacy