Not all enrichment is equally effective for pigs - research has identified which materials and approaches genuinely improve welfare in commercial farm conditions.
Enrichment for pigs has sometimes become a compliance exercise rather than a genuine welfare intervention - hanging a chain in a pen satisfies the letter of regulations without meeting the spirit. Pigs are highly motivated foragers that need to root, manipulate, and explore substrate materials. Research comparing enrichment types shows clearly that loose, manipulable organic materials like straw and compost are far superior to fixed objects. Effective pig enrichment requires ongoing novelty, appropriate materials, and sufficient quantity - and it reduces tail biting, a major welfare problem in commercial pig farming.