Laying Hen Keel Bone Fracture Welfare

The hidden welfare crisis of keel bone fractures in commercial laying hens across all housing systems.

Key Facts

Keel bone fractures affect an estimated 50-80% of laying hens in enriched cage, barn, and free-range systems
The keel bone is the breastbone; fractures occur from collisions with perches, nest box edges, and flock mates
Hens with keel bone fractures show pain-associated behaviors and have reduced access to resources
Fractures are more common in lightweight breeds selected for egg production over skeletal robustness
Perch design, drop height, and management can reduce fracture rates through environmental modification

Welfare Considerations

Keel bone fractures represent one of the most significant and least-publicized welfare problems in egg production. The fracture rate is extraordinarily high — affecting the majority of hens in nearly all commercial systems including those marketed as free-range or organic. Fractures cause measurable pain: affected hens show changes in posture, gait, and resource use consistent with discomfort. Yet the problem receives little regulatory attention compared to cage type debates. Genetic selection for skeletal robustness, perch design improvements, and management changes that reduce collision risk are the most promising interventions. Consumer awareness of this issue remains very low relative to its welfare significance.

What You Can Do

Advocate for keel bone fracture rates to be included in welfare assessments of all egg production systems
Support research into breeding programs that prioritize skeletal strength in laying hens
Engage with egg certification programs about including keel bone prevalence in audit criteria
Reduce egg consumption or shift to plant-based alternatives as one response to laying hen welfare concerns
Share information about keel bone fractures to raise awareness of this underreported welfare issue