Farm Animals

Pig Straw Provision Welfare Evidence

Straw is the most researched enrichment material for pigs, with robust evidence that its provision reduces aggression, stereotypy, and improves psychological welfare.

Key Facts

Pigs with straw access show 20-40% less aggression than those without
Straw satisfies rooting, chewing, and foraging motivations simultaneously
Long straw is more effective as enrichment than chopped or short straw
Automated straw dispensing systems allow large-scale provision in otherwise enrichment-poor systems
Straw provision is associated with lower tail biting rates in multiple studies

Welfare Considerations

Straw represents the benchmark enrichment material for pigs because it simultaneously satisfies multiple motivated behaviours. Systems that prevent straw provision on biosecurity or slurry system grounds should seek functionally equivalent alternatives - but none have demonstrated equivalent benefit.

What You Can Do

Support welfare standards requiring straw or functional equivalent enrichment for all pigs
Advocate for indoor pig systems compatible with bedded or straw-based enrichment
Choose pork from straw-bedded systems when available
Learn about pig enrichment research to understand why straw is the welfare standard