Pigs have cognitive abilities comparable to dogs and young children; designing farm environments that engage these capabilities is an important welfare frontier.
The cognitive sophistication of pigs fundamentally changes the moral and practical calculus of their welfare. A bored, cognitively understimulated pig in a bare concrete pen is not merely physically uncomfortable — it is experiencing something analogous to the psychological suffering of a highly intelligent social animal confined without stimulation. Cognitive enrichment — puzzle feeders, training sessions, novel object introduction, foraging substrate — satisfies intellectual needs and simultaneously reduces negative behavioral outcomes like tail biting. Training pigs for voluntary participation in veterinary procedures using positive reinforcement is both practically useful and welfare-enhancing. The evidence for pig cognition is now sufficiently strong that it should reshape how we design and regulate pig farming environments.