Research on pig cognition reveals sophisticated learning, emotional complexity, and self-awareness that strengthens the case for improved welfare standards in pig farming.
Pig cognitive research is progressively building a picture of an animal with emotional and cognitive complexity that demands serious welfare consideration. Cognitive bias testing — measuring whether animals interpret ambiguous stimuli positively or negatively — provides a window into affective states that complements behavioral and physiological welfare measures. Pigs in poor welfare conditions show pessimistic cognitive bias, while those with enriched environments show more optimistic interpretations, directly demonstrating that enrichment improves subjective experience. This evidence base strengthens the moral case for treating pig welfare not merely as a production efficiency variable but as an intrinsically important ethical priority. The gap between what cognitive science reveals about pig experience and the conditions of most intensive pig farming is significant and should motivate stronger welfare standards.