Chickens and Perch Access in Housing

Providing perches for laying hens addresses a fundamental behavioral need — chickens are motivated to roost at height — and their absence in cage systems is a significant welfare deficit.

Key Facts

Chickens are descended from jungle fowl that roost in trees at night to avoid ground predators
Perch access is associated with stronger bones, better foot health, and reduced fearfulness in laying hens
Hens will prioritize perch access even when it requires effort, indicating strong behavioral motivation
Battery cages provide no perch opportunity; enriched cages are required in the EU to provide minimal perching
Free-range and barn systems with perches show lower rates of keel bone fractures when perch design is appropriate
Keel bone fractures affect 50 to 80% of hens in some cage-free systems due to poor perch design or placement

Welfare Considerations

Perch access for laying hens addresses an evolved behavioral need rooted in predator avoidance. Hens deprived of perching opportunities show persistent motivation to access elevated surfaces — a behavioral frustration that contributes to stereotypic behavior. But the provision of perches alone is insufficient without attention to design: poorly positioned or constructed perches increase keel bone fracture rates as birds misjudge landings. The welfare benefits of perching are maximized by correctly designed perch systems at appropriate heights with gentle landing gradients — details that distinguish welfare-positive from welfare-neutral cage-free transitions.

What You Can Do

Choose eggs from farms certified with evidence-based perch provision standards
Advocate for perch design standards that reduce keel bone fracture risk in cage-free systems
Support research into optimal perch design that maximizes behavioral benefit while minimizing injury
If keeping backyard hens, provide adequate perch space with gradual access ramps
Engage with the detail of perch provision standards rather than accepting cage-free as automatically welfare-sufficient