Pigs are among the most cognitively sophisticated farm animals, with intelligence comparable to dogs, and their welfare needs for mental stimulation are systematically underestimated and unmet in intensive production.
Pigs are cognitively complex animals whose intelligence creates specific welfare needs that intensive farming systematically fails to address. An animal capable of complex social relationships, episodic memory, and problem-solving experiences a qualitatively different kind of suffering in impoverished environments than a cognitively simpler species would. Boredom, frustration, and the absence of mental stimulation are real welfare harms for pigs. The motivation to explore, root, and engage with a complex environment is frustrated in barren concrete pens. The capacity for social relationships means that disrupted social groups, mixing of unfamiliar pigs, and isolation cause psychological distress that extends beyond physical stress responses. Cognitive welfare needs — the need to engage with an interesting, changeable environment — represent an aspect of pig welfare that current welfare science and farming practice are only beginning to address seriously.