Welfare science has expanded beyond preventing negative experiences to actively promoting positive emotional states in farm animals, representing a paradigm shift in how we measure good welfare.
Traditional welfare assessment focused almost exclusively on preventing negative experiences - pain, fear, hunger. Positive welfare science recognizes that the absence of suffering is necessary but not sufficient for good welfare. Animals should have opportunities to experience positive states including curiosity, playfulness, social bonding, and the satisfaction of performing natural behaviors. Farm systems that provide these opportunities - enriched environments, appropriate social groups, and behavioral freedom - achieve higher welfare than those focused only on minimizing negative inputs.