Dustbathing is a fundamental behavioral need in chickens; its deprivation in conventional housing causes chronic frustration and stress.
Dustbathing is a highly motivated behavior in hens — they perform it regularly even when substrates are unavailable, demonstrating air-dustbathing in cages. Substrate deprivation is associated with chronic frustration, elevated stress hormones, and increased feather pecking. Providing loose friable substrate substantially improves hen welfare.