Animal welfare science has shifted from focusing solely on preventing suffering toward assessing positive welfare states. Understanding positive indicators helps create environments where animals genuinely thrive.
The shift toward positive welfare assessment represents a conceptual revolution in animal welfare science. Preventing suffering is necessary but not sufficient — a welfare-neutral state of mere absence of pain, hunger, and fear falls short of what we now understand animals are capable of experiencing. Animals in positive welfare states show curiosity-driven exploration, play with conspecifics and objects, approach humans voluntarily, show behavioral diversity, and make optimistic decisions in judgment bias tests. These positive states are not luxuries — they reflect functioning motivational and emotional systems that have biological value. Creating farm, zoo, and companion animal environments that generate positive welfare states requires active design: enrichment that is novel and engaging, appropriate social companions, choice and control over the environment, and opportunity to express species-typical behaviors that bring intrinsic reward.