The Feline Grimace Scale provides a validated, non-invasive tool for assessing acute pain in cats using facial action units observable by owners and clinicians.
Pain recognition in cats represents a critical welfare gap that the Feline Grimace Scale helps address. Cats evolved as both predators and prey, leading to behavioral suppression of overt pain signs that predators exploit. This means cats in significant pain often appear superficially normal, leading to undertreatment. The FGS provides an objective scoring method based on facial expressions that are involuntary and difficult to suppress even in stoic individuals. Owner education on using the FGS empowers more effective pain reporting during veterinary consultations. The scale is particularly valuable in the postoperative period and during illness monitoring at home. Integration of the FGS into routine veterinary practice represents an important step toward better feline pain management and welfare outcomes.