FIP was previously fatal but antiviral treatments have transformed outcomes. Understanding the disease and new treatment enables informed welfare decisions for affected cats.
FIP was one of the most devastating diagnoses in feline medicine — a previously fatal disease affecting young cats most commonly. The development of effective antiviral treatments represents a transformative welfare advance. Cats that previously would have been euthanized within days of diagnosis can now achieve sustained remission with treatment. However, accessibility remains a welfare issue: treatment is expensive (sometimes $2,000-8,000 USD) and in some countries antivirals remain unlicensed requiring sourcing from alternative suppliers. Owner awareness of new treatment options is essential — veterinarians and cat owners both need current information about what is now achievable for FIP-affected cats.