Environmental enrichment is legally required for pigs in the EU and is a cornerstone of good pig welfare, addressing their strong motivation to root, explore, and manipulate objects — needs frustrated in barren commercial environments.
The pig's need for environmental enrichment is not a luxury but a fundamental welfare requirement — rooting and exploration are strongly motivated behaviours that cause distress when frustrated. In barren slatted environments, pigs redirect redirectable behaviours toward pen-mates, causing tail biting outbreaks that spiral into serious welfare emergencies requiring painful interventions (tail docking, separation of bitten pigs). Effective enrichment — particularly rooting substrates like straw, compost, or peat — prevents this cascade by satisfying the underlying behavioural motivation. Research clearly shows that substrate-based enrichment is dramatically more effective than object-based enrichment (chains, toys) at reducing redirected behaviours. Compliance monitoring across EU farms shows that enforcement of enrichment requirements remains inconsistent, with many pigs still housed in effectively barren environments.