Foraging is one of the most time-intensive and motivationally important behaviors in chickens, and its deprivation in barren production systems is a major source of welfare harm.
Foraging in chickens is not simply a means of obtaining food — it is a behavioral system with intrinsic motivational value that persists even when food is freely available. Hens given the choice between receiving food in a trough or working to obtain the same food through foraging will often choose to work, demonstrating that the activity itself has value. In barren indoor systems without litter or foraging substrate, this motivation finds no appropriate outlet and is redirected into feather pecking of other birds — a major welfare problem. Providing appropriate foraging opportunities is among the most cost-effective welfare improvements available in poultry production.