Beak trimming is performed in most commercial egg production systems to reduce feather pecking and cannibalism. The procedure causes pain and lasting neurological changes, raising significant welfare concerns.
Beak trimming causes acute pain and post-procedural sensitivity that can last weeks. Neuromas — painful nerve tangles — form at the trimming site and may cause chronic pain. Infrared trimming is less damaging than hot-blade trimming but still causes measurable welfare impacts. The welfare case against beak trimming is strong; the case for it rests on the argument that feather pecking and cannibalism in untrimmed birds in poor environments causes more suffering. The real solution — improving environments sufficiently to eliminate pecking — is pursued in Scandinavia with success.