Scientific research on pig enrichment has identified which materials best satisfy behavioural needs. Evidence-based enrichment selection optimises welfare outcomes.
Enrichment science for pigs has moved beyond simple provision of any object to evidence-based specification of material properties that satisfy natural behaviour motivations. Degradable materials that pigs can root into and manipulate satisfy the rooting drive that fixed objects cannot. The practical challenge of providing substrate enrichment in slurry-based systems has driven research into manure management solutions compatible with straw provision. On-farm trials consistently demonstrate welfare benefits through reduced tail biting and improved activity budgets.