Feather pecking is a major welfare problem in laying hen flocks causing injury, chronic stress, and death. It is a behavioral indicator of inadequate environments rather than an inherent flaw in the birds.
Feather pecking is a welfare problem that is both a cause and a symptom of poor welfare. Birds peck each other because their behavioral needs for foraging, exploration, and adequate space are unmet. The industry response of beak trimming treats the symptom while leaving the underlying welfare problems in place. High-welfare systems that provide appropriate litter, foraging opportunities, sufficient space, and environmental complexity can eliminate severe feather pecking without resorting to painful mutilation.