Rooting is a fundamental, highly motivated behaviour in pigs that is severely restricted in intensive housing systems, with significant welfare consequences.
Rooting is to pigs what flight is to birds: a behaviour so fundamental to the species' identity and wellbeing that preventing it causes irreversible welfare harm. The near-total elimination of rooting opportunity in intensive pig production — concrete floors, no substrate, inadequate enrichment — deprives pigs of one of their most important behavioural needs for their entire lives. The resulting frustration expresses itself in tail biting and aggression that harms other pigs. Tail docking — routinely performed to reduce the consequences of biting — treats the symptom while leaving the underlying welfare problem untouched. Providing real rooting material is not a luxury but a minimum welfare requirement for a species with rooting at the core of its behavioural repertoire.