Pigs have a powerful instinctive drive to root and manipulate objects with their snouts, and oral enrichment is one of the most evidence-based welfare improvements for intensive pig production.
Oral and rooting enrichment for pigs represents one of the most evidence-based, practical welfare improvements available in intensive production. The evidence consistently shows that pigs provided with effective rooting substrates have lower rates of tail biting, stereotypy, and aggression — the three most common indicators of welfare failure in intensive systems. Yet compliance with EU enrichment requirements remains inconsistent, partly because provision of effective organic enrichment is more difficult to manage in fully slatted systems and partly because non-organic alternatives like chains are permitted despite being less effective. Consumer-facing welfare certification schemes that specify enrichment type and quantity — rather than simply its presence — are more powerful welfare instruments than minimum legal requirements. Straw provision in some form, even at low levels, substantially outperforms non-organic alternatives in meeting rooting motivation.