Providing pigs with enrichment materials that allow expression of natural rooting and foraging behaviour is a legal requirement in the UK and a cornerstone of good pig welfare.
Pig enrichment addresses a fundamental welfare need: the expression of natural rooting and foraging behaviour that occupies 15-20% of daily activity in wild boar. Denying this behaviour causes stereotypies, frustration, and redirected behaviour toward pen mates causing ear and tail biting. The law requires enrichment provision but enforcement and compliance vary. Straw is among the most effective enrichment materials - it satisfies rooting, provides thermal comfort, and improves flooring. The gap between legal requirements and actual farm practice remains a significant welfare issue. Enrichment that genuinely satisfies rooting needs, rather than meeting the minimum letter of regulation, is the welfare standard farms should aspire to.