Scientific research demonstrating positive emotional states in farm animals provides evidence that good welfare includes positive experiences, not merely the absence of suffering.
Research on positive emotions in farm animals has shifted welfare science beyond the prevention of negative states to the active promotion of positive experiences. The cognitive bias test reveals that animals in good welfare have optimistic expectations about ambiguous stimuli, while animals in poor welfare show pessimistic biases. Cows released to spring pasture after winter housing show exuberant play behavior indicating genuine positive affect. These findings have practical welfare implications: environments and management systems should be evaluated not just for what harms they prevent but for what positive experiences they enable. The best farm animal welfare is not merely the absence of suffering but the presence of positive engagement with life.