Feline chronic gingivostomatitis (FCGS) is a debilitating condition causing severe oral inflammation and pain that profoundly affects a cat's quality of life. Understanding this condition is critical for welfare-conscious cat care.
FCGS is one of the most painful conditions in veterinary dentistry. Cats are obligate carnivores that must eat meat, yet FCGS makes eating acutely painful. Many cats stop eating entirely or develop food aversions due to pain conditioning. The chronic pain alters behavior: affected cats become withdrawn, aggressive when touched near the face, and lose interest in normal activities. Despite severe pain, cats often mask suffering, meaning many cases go undiagnosed for months or years. Even after full-mouth extraction - a major surgery - some cats fail to respond and require ongoing pain management. The welfare burden of untreated FCGS is substantial and often invisible to owners.