Beak trimming in laying hens reduces feather pecking and cannibalism but causes pain and impairs foraging behavior, making it a controversial welfare trade-off.
The beak is a precision sensory organ vital for foraging, preening, and social interaction. Trimming impairs these functions and has both short-term pain and potential long-term neuromas. Yet feather pecking causes severe suffering when it escalates to cannibalism. The welfare solution lies in housing systems that provide sufficient space, enrichment, and natural behaviors to prevent pecking outbreaks without mutilation. Risk factors including high stocking density, poor lighting, and insufficient litter must be managed proactively.