Research into positive emotions in pigs reveals sophisticated affective lives that challenge conventional assumptions about farm animal psychology and moral status.
The science of pig positive emotions has advanced sufficiently to support confident claims about their affective richness. Pigs do not merely avoid negative states — they actively seek positive experiences and show evidence of anticipatory pleasure, social joy, and what appears to be genuine playful exuberance. Their empathic responsiveness to other pigs means that welfare is not merely an individual but a collective phenomenon — stressed pigs spread stress through their social group. This research fundamentally changes the ethical calculus of pig farming: the question is not only whether pigs suffer in current systems (they do) but whether they can experience genuinely good lives — and the evidence suggests they can, given appropriate conditions.