Recognizing pain in pigs is challenging but critical for welfare. Validated assessment tools enable farmers and vets to identify suffering early and intervene appropriately.
Pain recognition in pigs requires specific training because their stoic prey animal nature means behavioral signs are subtle and easily missed. Pigs in pain may be less vocal rather than more, may isolate from the group, and may show reduced activity that is easily misattributed to contentment. Validated assessment tools including the pig grimace scale use facial action units — brow lowering, orbital tightening, cheek tightening — to objectively score pain without requiring behavioral interpretation. Regular training of stockpeople in these assessment methods enables earlier pain recognition and prompt treatment. The economics of pain management are increasingly positive — treated pigs recover faster and have better production outcomes — creating alignment between welfare and productivity.