Beak trimming is performed on billions of laying hens annually to reduce injurious pecking. Evidence shows it causes acute and chronic pain, driving welfare reform efforts.
The beak is richly innervated and highly sensitive — it is central to how hens explore, forage, and interact with their world. Trimming causes acute pain from tissue damage and may cause chronic pain through neuroma formation. However, feather pecking and cannibalism in crowded conditions cause severe welfare harm to victims. The fundamental welfare problem is the high-density housing system that drives injurious pecking. Eliminating beak trimming requires lower stocking densities, better litter quality, more environmental complexity, and selective breeding for reduced pecking — systemic changes that require regulatory pressure and consumer demand.