Pigs have cognitive abilities comparable to dogs and surpassing many primates in certain tasks, yet are farmed in environments that deny their intellectual needs — a welfare deficit that evidence-based enrichment can meaningfully address.
The cognitive welfare of farmed pigs represents a largely unaddressed dimension of suffering in intensive systems. Pigs are not passive creatures who merely require adequate nutrition and physical health — they have demonstrated awareness, problem-solving ability, emotional complexity, and likely a form of self-recognition. In barren concrete pens with nothing to investigate, manipulate, or solve, pigs develop pessimistic cognitive biases measurable through judgment bias tasks — a validated indicator that their subjective state is negative. Enrichment that engages their intelligence — rooting substrates, novel objects, foraging challenges, social structures that allow normal hierarchical behavior — shifts cognitive bias toward optimism and improves measurable welfare indicators. The scientific evidence is clear: pig farming that ignores cognitive needs is producing not just stressed but cognitively impoverished animals.