FIP has transformed from a fatal diagnosis to a treatable condition with antiviral drugs, dramatically improving welfare outcomes for affected cats.
Before effective antiviral treatment, FIP was universally fatal within weeks. Affected cats experienced organ failure, severe weight loss, and respiratory distress. The advent of GS-441524 antivirals has transformed welfare outcomes, with the majority of cats now achieving remission and returning to normal quality of life. Access to treatment remains inequitable due to cost, with many owners choosing euthanasia rather than face unaffordable treatment bills. Advocacy for accessible treatment pricing is now a welfare priority for this historically devastating disease.