Cat Feline Infectious Peritonitis Welfare

FIP was once invariably fatal in cats, but revolutionary antiviral treatments have transformed it from a death sentence to a treatable disease, representing a landmark advance in feline welfare.

Key Facts

FIP is caused by a mutant form of feline coronavirus that affects approximately 1 in 200 cats exposed to the common feline enteric coronavirus
The wet form causes fluid accumulation in chest or abdomen; the dry form causes organ granulomas
Until 2019, FIP was almost universally fatal - treatment was entirely palliative
GS-441524 and remdesivir antiviral treatments achieve remission in approximately 80-90% of FIP cats
Treatment requires 12 weeks of daily injections or oral medication, costing $3,000-8,000
Access to treatment remains inequitable - cats of owners who cannot afford it still die of a now-treatable disease

Welfare Considerations

FIP causes significant suffering - wet form causes progressive breathlessness from fluid accumulation; dry form causes neurological signs, eye inflammation, and organ failure. Without treatment, the disease is a prolonged downhill course over weeks to months. With antiviral treatment, cats typically improve dramatically within days - it is one of the most striking treatment responses in veterinary medicine. The current welfare crisis is access: the drugs are still not commercially licensed in many countries, meaning some cats die of a treatable disease based on owner finances or geographic location.

What You Can Do

If your cat is diagnosed with FIP, seek a specialist familiar with antiviral treatments immediately
Support organizations working to lower barriers to FIP treatment including cost-sharing programs
Advocate for commercial licensing of GS-441524 to reduce treatment costs through market competition
Donate to FIP advocacy groups working to make treatments accessible globally
Keep cats indoors to reduce exposure to feline coronavirus which can mutate to cause FIP
Support research into FIP prevention including potential vaccine development