Pigs have a strong biological drive to root and explore their environment, and providing appropriate enrichment materials is a welfare requirement that is frequently inadequately implemented in intensive systems.
Enrichment provision for pigs represents one of the clearest gaps between legal requirement and welfare reality in European pig farming. The law requires enrichment; the reality is typically a hanging chain that pigs briefly investigate before losing interest. Genuine enrichment that satisfies rooting motivation requires materials pigs can actually root through and destroy. Straw, where biosecurity allows, is the gold standard. The welfare cost of inadequate enrichment is borne by every pig in every understimulated pen, manifesting as boredom-driven aggression, tail biting, and chronic psychological understimulation.