Cat Feline Infectious Peritonitis: Welfare and Treatment

Feline infectious peritonitis (FIP) was historically fatal but new antiviral treatments have transformed the welfare outlook for affected cats.

Key Facts

FIP is caused by a mutated form of feline coronavirus that triggers fatal systemic inflammation
It affects cats of all ages but is most common in young cats under three years
Until 2019, FIP was almost universally fatal with only palliative care available
Antiviral drugs including GS-441524 and Molnupiravir have shown 80-90% remission rates in trials
Treatment courses typically last 84 days with continued monitoring after completion
Cost of treatment can reach several thousand pounds, creating welfare inequity based on owner finances
Wet FIP with fluid accumulation causes breathing difficulties and abdominal discomfort before diagnosis
Early diagnosis significantly improves treatment outcomes - veterinary assessment at first signs is essential

Welfare Considerations

FIP causes serious suffering including lethargy, fever, fluid accumulation causing respiratory distress and abdominal pain, and neurological signs. Before effective antivirals, affected cats faced euthanasia or prolonged palliative care without hope of recovery. The availability of effective antiviral treatment has transformed the welfare picture - a formerly invariably fatal condition now has good prognosis with treatment. Access barriers including cost and availability of licensed treatments represent ongoing welfare inequity that veterinary and regulatory bodies are working to address.

What You Can Do

If your cat shows signs including fever, weight loss, and abdominal swelling seek veterinary assessment urgently
Discuss antiviral treatment options with your vet if FIP is suspected - treatment is now available
Contact FIP welfare support groups and charities if treatment costs are prohibitive
Support campaigns for licensed affordable antiviral access for cats with FIP
Advocate for pet insurance coverage that includes antiviral treatments for FIP