The science of positive emotions in pigs demonstrates that good welfare requires active promotion of positive states including play, curiosity, and social comfort, not merely absence of suffering.
Pig positive emotion science represents the maturation of animal welfare from a predominantly negative framework (preventing suffering) to a genuinely positive one (promoting flourishing). The documented capacity of pigs for positive emotional states — play enthusiasm, social joy, anticipatory excitement — creates an ethical obligation not just to prevent their suffering but to enable their positive experiences. This higher standard of welfare obligation transforms what "adequate" welfare means: a pig who is not in pain but has no opportunities for play, exploration, or social positive interaction is not experiencing good welfare despite meeting minimum standards. The positive welfare movement is recalibrating the target for farming welfare from sufficient to genuinely good.