Dustbathing is a fundamental behavioral need for chickens. Deprivation causes significant welfare consequences. Understanding this behavior informs better housing standards.
Dustbathing deprivation is one of the best-documented examples of behavioral frustration in animal welfare science. Hens deprived of substrate perform vacuum dustbathing, demonstrating that the motivation is internally driven and that its frustration causes genuine welfare harm. The highly repetitive and intense nature of dustbathing when substrate finally becomes available after deprivation confirms a state of rebound behavior consistent with significant previous frustration. For billions of battery cage hens worldwide, this fundamental behavioral need remains chronically unmet.