Colony cages provide marginally more space than battery cages but still prevent natural behaviors; welfare improvements are significant compared to battery systems but fall short of cage-free standards.
Colony cages represent a meaningful but incomplete welfare improvement over battery cages. The addition of nest boxes, perches, and scratch areas allows expression of some key behaviors previously entirely prevented. However, crowding remains severe, and hens still cannot perform wing flapping, dust bathing in substrate, or extensive foraging. Mortality and bone health metrics show improvement over battery systems but remain inferior to cage-free and aviary systems. The global corporate commitment to cage-free by major food companies reflects judgment that colony cages remain an insufficient welfare standard.