Dust bathing is a highly motivated natural behavior for chickens that is severely restricted in intensive systems, causing chronic behavioral frustration.
Dust bathing is one of the most robustly motivated behaviors in domestic chickens - they will persist in attempting to dust bathe even in barren environments, performing the full behavioral sequence on bare wire or metal surfaces. This 'vacuum' behavior is a welfare indicator demonstrating that denial of dust bathing opportunity causes genuine behavioral frustration. Providing appropriate substrate is a low-cost intervention with clear welfare benefits, yet it remains absent from most intensive production systems. The welfare case for mandatory dust bathing access as a baseline standard is strong.