Play behavior in pigs is a reliable indicator of positive welfare states. Farms and welfare schemes that monitor and promote play are moving beyond the absence of suffering toward genuine positive welfare.
Play is one of the most compelling indicators of positive emotional states in animals. When a pig plays - running in spontaneous bursts, leaping, engaging in social mock-fighting - it is expressing a state of physical comfort, psychological security, and social ease. Farms that have the conditions for play behavior are providing something beyond welfare minimums: they are providing conditions for genuine positive experience. Monitoring and promoting play as a welfare outcome is a powerful way to shift farm management culture toward positive welfare goals rather than simply avoiding harm.