Research on positive emotional states in pigs is advancing welfare science beyond the absence of suffering toward the active promotion of positive experiences in farm settings.
Positive emotion research in pigs is reshaping what good pig welfare looks like by demonstrating that pigs in appropriate conditions experience states that appear functionally analogous to joy, anticipation, and contentment. This matters practically because it shifts welfare assessment from solely measuring the absence of negative states to also monitoring the presence of positive ones. A farm that prevents injury and disease but provides no opportunities for play, exploration, or positive social interaction fails to provide good welfare even if it meets minimum welfare standards. The research also demonstrates that positive welfare is achievable within commercial systems: pigs with access to adequate space, rooting material, and social stability show clear behavioral markers of positive emotional states.