Laying hens have complex behavioral needs shaped by millennia of evolution that conventional egg production systems frequently fail to accommodate.
Laying hen welfare is fundamentally shaped by the mismatch between evolutionarily embedded behavioral drives and the environments in which most commercial hens live. The nesting urge is particularly strong - hens confined without nest access show classic thwarting behavior including pacing, vocalizing, and repeated attempts to find a secluded space - this is clear evidence of distress. Dust bathing deprivation is well-documented as causing frustration, with hens performing sham dust bathing on wire floors. The inability to roost at height means hens must rest on the floor, violating a deeply embedded predator-avoidance instinct. Foraging deprivation removes a behavior that would occupy the majority of a free-ranging hen's active time. Systems that address all of these behavioral needs - cage-free with nest boxes, perches, dust bathing material, and foraging enrichment - provide meaningfully better welfare than those addressing only space.