Perching is a fundamental behavioural need for laying hens, providing nocturnal security, exercise, and expression of natural repertoires — yet conventional cage systems deny this need entirely, causing measurable welfare deficits.
The welfare significance of perching goes beyond the behaviour itself. Access to elevated perches allows hens to exercise the wing-flapping and jumping movements that build bone density, reducing the fractures that cause chronic pain in cage-raised birds. Perching also provides psychological security — hens are prey species for whom height provides vigilance advantage and reduces predator-related anxiety. Enriched cage systems that provide perch strips fail to deliver these benefits fully because the space is insufficient for functional use and the wire substrate is inappropriate. Consumer demand for cage-free eggs has driven significant legislative and industry change, but "cage-free" systems require careful design to deliver the perch access their occupants need.