Research on pig enrichment has identified what materials and objects best meet pigs' behavioural needs, moving from token compliance toward genuine welfare improvement.
The science of pig enrichment has advanced considerably, revealing that not all enrichment is equal. Materials that are chewable, manipulable, destructible, and novel are far more effective than fixed objects like chains. Providing pigs with rooting substrates like straw or compost satisfies instinctive behaviours and reduces redirected aggression. Implementing effective enrichment requires farmer investment but also produces measurable improvements in pig health and productivity.