Pig Enrichment Material Research

Research into optimal enrichment substrates for pigs has identified key features that address rooting and foraging needs, informing welfare standards around the world.

Key Facts

Straw is the most studied and effective enrichment material for pigs, meeting rooting and foraging needs
Enrichment must be manipulable, destructible, and novel to maintain engagement over time
Fixed objects like chains provide minimal enrichment compared to substrates pigs can root and chew
Compost, peat, and wood shavings are effective alternatives where straw is impractical
Enrichment provision reduces tail-biting, a key welfare problem in intensive pig production

Welfare Considerations

Pig enrichment research has moved from asking whether enrichment helps to identifying what type of enrichment meets behavioral needs most effectively. The evidence clearly favors manipulable, destructible substrates that allow rooting behavior over fixed objects that provide only nominal compliance with enrichment requirements. Welfare certification that specifies substrate type and quantity - rather than merely requiring 'enrichment' - produces the behavioral welfare improvements the research supports.

What You Can Do

Advocate for enrichment standards specifying manipulable substrates in pig welfare regulations
Support retailers requiring straw or equivalent substrate provision in pork supply chains
Choose pork certified under schemes with specific enrichment material requirements
Engage with pig industry welfare research to promote evidence-based standards