The Piglet Grimace Scale and Pig Grimace Scale provide validated tools for recognizing pain in farmed pigs. Farmer and veterinary training in their use is transforming early pain identification and treatment.
The development of validated pain recognition tools for pigs represents a practical advance that directly reduces suffering. Pain that goes unrecognized is pain that goes untreated - and pig pain has historically been systematically underrecognized due to the species' stoic behavioral responses. The grimace scale provides farmers and vets with an objective, evidence-based method to identify pain states that behavior alone might miss. Widespread adoption of grimace scale training in agricultural education would directly translate into earlier intervention and reduced suffering for millions of pigs annually.