Positive reinforcement training of pigs in research and farm settings has demonstrated significant welfare benefits through voluntary participation in husbandry, reduced stress, and improved human-animal relationships.
Positive reinforcement training in pigs demonstrates that even in commercial farming contexts, meaningful welfare improvements are achievable through changes in human-animal interaction rather than costly infrastructure investment. A pig that voluntarily approaches handlers, accepts procedures without restraint, and has a positive association with human contact experiences fundamentally different welfare to one that is forcibly caught and restrained for every intervention. The benefits are bidirectional: trained pigs are safer to handle, reducing keeper injury risk, while experiencing lower stress throughout husbandry procedures. The broader welfare implication is that the quality of human-animal relationships on farms — the stock person effect — is a welfare variable of comparable importance to physical environment, yet receives far less regulatory and industry attention.