Farmed Animals

Laying Hen Perch Access and Keel Bone Fractures

Keel bone fractures affect up to 80% of commercial laying hens and are directly linked to perch design, stocking density, and lack of exercise.

Key Facts

Studies find keel bone fractures in 50-80% of laying hens in commercial systems
Fractures are painful and affect posture, movement, and egg production
Perch design, height, and footing texture significantly affect fracture rates
Aviaries with floor-level perching opportunity show lower fracture prevalence

Welfare Considerations

Keel bone fractures have long been dismissed as a minor production issue, but pain assessment studies confirm they cause significant nociceptive pain. Hens with fractures show gait abnormalities, reduced perching, and altered behavior consistent with chronic pain. The prevalence makes this one of the largest welfare problems in commercial egg production.

What You Can Do

Choose eggs from farms with documented low keel bone fracture rates
Support research into perch designs that reduce fracture risk
Advocate for fracture monitoring as a mandatory welfare indicator in egg certification
Reduce egg consumption or choose plant-based alternatives