Play behavior in pigs is a validated indicator of positive welfare states, and housing systems that enable play produce animals with better immune function, lower stress hormones, and higher productivity.
Pig play is not a luxury - it is a welfare indicator and a biological signal. When pigs play, they are expressing positive emotional states that predict lower stress, better health, and better production outcomes. Housing systems that enable play - through provision of adequate space, appropriate enrichment, and stable social groups - produce genuinely better welfare and often better economics simultaneously. The business case for positive pig welfare is increasingly clear.