Scientific methods for measuring positive emotional states in farm animals have advanced significantly, providing the evidence base for welfare standards that go beyond harm prevention to require positive experience provision.
Positive welfare research provides the scientific foundation for the most ambitious welfare standards that require animals to experience genuinely good lives rather than merely tolerable ones. This research matters enormously because it moves welfare science from the defensive position of proving suffering exists to the forward position of defining what thriving looks like and measuring its presence. Standards built on this foundation can claim not just to reduce harm but to actively promote animal flourishing — a qualitatively different and more morally ambitious welfare objective.