Pigs demonstrate cognitive abilities comparable to dogs and young children, and understanding their intelligence reframes the welfare implications of intensive confinement and impoverished environments.
The cognitive complexity of pigs profoundly deepens the welfare case against intensive confinement. Animals capable of planning, social bonding, and emotional experience suffer differently and more deeply when confined in barren, socially disrupted environments. A pig that experiences boredom, frustration, and the absence of meaningful social bonds is not simply experiencing discomfort — it is experiencing a sustained deprivation of the conditions for positive psychological states. Welfare frameworks that account for cognitive complexity make a stronger case for enriched, socially complex environments than those focused only on physical health.