Beak trimming of laying hens causes acute and chronic pain but persists as a management response to pecking behaviour rooted in crowding and inadequate enrichment.
Beak trimming is a welfare intervention performed to prevent another welfare problem, creating a circular dynamic that reflects fundamental inadequacies in how laying hens are housed and managed. The injurious pecking that trimming prevents is itself a welfare failure caused by crowding, inadequate enrichment, and the inability of subordinate hens to escape dominant individuals. Treating this symptom through beak trimming rather than its cause through better management allows inadequate housing to continue by removing the most visible signal of its inadequacy. Countries that have banned trimming while improving housing standards demonstrate that injurious pecking can be managed without mutilation. The welfare imperative is to address the root causes of pecking through housing, management, and genetic selection, eliminating the need for trimming rather than continuing to inflict it.