Research increasingly documents that farm animals experience positive emotional states including playfulness, curiosity, and contentment. This evidence strengthens the case for actively promoting welfare rather than merely preventing suffering.
The documentation of positive emotional states in farm animals challenges the assumption that preventing suffering is sufficient. Animals that can play, explore, and engage socially are experiencing welfare goods that go beyond the mere absence of pain. Cognitive bias tests — where animals in positive states make more optimistic judgements about ambiguous situations — provide objective measures of emotional valence in non-verbal animals. Welfare frameworks that include positive experiences are more complete and set higher standards than those focused only on harm prevention.