Perches are a fundamental behavioral need for chickens, but design matters enormously. Poorly designed perches cause foot problems, while well-designed perches promote natural behavior and reduce stress.
Perch provision illustrates the complexity of welfare-oriented enrichment design: providing the wrong kind of enrichment can cause harm while providing no enrichment at all. Keel bone damage is now recognized as one of the most prevalent welfare problems in cage-free and enriched colony layer hen systems - and perch design is a major contributing factor. Poorly positioned, poorly shaped, or overcrowded perches lead to collision injuries and keel fractures. Getting perch design right requires understanding chicken behavioral preferences, breed differences, and housing layout. The welfare community has increasingly recognized that the cage-free transition, while important, must be accompanied by attention to injury prevention - including perch specification - to genuinely improve welfare.