Intensive Farming

Chicken Keel Bone Fracture Welfare

Keel bone fractures affect the majority of laying hens and represent one of the most prevalent welfare problems in poultry farming.

Key Facts

Studies find keel bone fractures in over 50% of laying hens in barn and free-range systems
Fractures cause pain that persists for weeks as the keel bone is used continuously
Free-range and aviary systems have higher fracture rates than enriched cages due to collisions
Better perch design and reduced flock size reduce fracture incidence

Welfare Considerations

Hens with keel bone fractures use their damaged sternum in every breath and movement, creating chronic pain that persists until healing or slaughter. Behavioral indicators including reluctance to fly and reduced feeding suggest significant suffering. The fracture rate exceeds 50% in many systems marketed as higher welfare. Addressing fracture incidence requires system redesign including better perch placement and reduced stocking density.

What You Can Do

Advocate for keel bone fracture incidence to be a welfare audit metric
Support research into prevention through system design
Choose egg producers committed to reducing keel bone fracture rates
Learn about keel bone fractures as a hidden welfare issue in free-range systems