Research into pig, chicken, cow, and sheep cognition has revealed capacities far exceeding traditional assumptions; this scientific understanding has profound implications for how we evaluate the welfare significance of intensive farming.
Farm animal cognition research has systematically dismantled the assumption that production species lack the mental complexity to suffer in ways morally comparable to more obviously intelligent animals. Each finding — a pig solving a symbolic task, a hen making a numerosity judgement, a cow recognising a familiar human face — adds evidence to the case that these animals have rich inner lives inconsistent with the conditions of intensive confinement. The welfare implications are proportional to the cognitive complexity revealed.