Welfare science has expanded beyond measuring absence of suffering to developing positive welfare indicators that assess experiences of pleasure, play, and positive emotional states.
The shift from welfare as absence of suffering to welfare as presence of positive experience represents one of the most significant conceptual advances in animal welfare science. Animals that are merely not suffering may still have impoverished lives lacking the positive experiences of play, social bonding, exploration, and achievement. Developing validated positive welfare indicators enables farmers, zoo keepers, and pet owners to assess whether animals are actually thriving, not merely surviving. This science is reshaping welfare standards across all animal management contexts.