Recognizing and responding to pain in livestock is a fundamental stockmanship skill; validated assessment tools are improving the consistency and reliability of pain recognition on farms.
Livestock pain recognition requires trained observation because prey species suppress behavioral pain indicators as a survival adaptation. Animals in significant pain may continue eating, standing, and appearing behaviorally normal to untrained observers. Validated grimace scales based on facial action units provide standardized, reliable assessment that reduces observer bias. Early pain recognition and prompt treatment prevents acute pain from becoming chronic and prevents animals from declining to the point where outcomes are compromised. Pain recognition training for farm workers is among the highest-welfare-impact training investments.