Pigs are among the most cognitively sophisticated farm animals — their intelligence creates specific welfare needs for mental stimulation, agency, and social complexity that intensive farming often fails to meet.
The cognitive sophistication of pigs creates a moral obligation to provide environments that engage their minds. A pig in a barren concrete pen cannot express the exploratory, social, and problem-solving behaviors that their intelligence drives. The result is not simply boredom but measurable psychological deterioration: chronically understimulated pigs show pessimistic cognitive biases, reduced play, and behavioral despair analogous to depression in humans. The welfare solution requires environmental enrichment that provides genuine cognitive challenge — rooting material that changes character over time, puzzle feeders with variable rewards, novel objects, and social environments that enable complex social interaction. This is not sentimentality: enriched pigs show better productivity, lower aggression, and reduced veterinary costs, making cognitive welfare economically rational as well as ethically necessary.