12/09/2025
Feline Coronavirus and FIP in Cats: What Every Cat Owner Should Know
It’s important for every cat owner to understand that Feline Coronavirus (FCoV) is incredibly common and affects a significant portion of the feline population. In fact, it’s estimated that 80-90% of cats—both pedigreed and domestic—carry this virus. Here’s what you should know:
🐾 Feline Coronavirus (FCoV)
• FCoV is common in cats, especially in multi-cat households.
• Most cats infected with FCoV will show no symptoms or may experience mild digestive upset, such as diarrhea.
• The virus is primarily spread through f***s and can be easily contracted in shared litter boxes.
• Regular cleaning, stress management, and proper hygiene practices help reduce the risk of spread.
• Even kittens from the cleanest, best-managed catteries or homes; unfortunately happens.
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🐾 Feline Infectious Peritonitis (FIP)
• FIP is a rare but serious condition caused by a mutation of FCoV within the cat’s body.
• Most cats with FCoV do not develop FIP; only a small percentage experience the mutation that causes the disease.
• Forms of FIP:
• Effusive (“wet”) form – fluid buildup in the abdomen or chest
• Non-effusive (“dry”) form – organ involvement and general signs like weight loss, fever, depression
• Neurological FIP – affects the brain and spinal cord, causing wobbling, seizures, or behavioral changes
• Ocular FIP – affects the eyes, causing inflammation or vision problems
• Effusive cases can evolve into dry, neurological, or ocular forms and vice versa. Early signs may include loss of appetite, weight loss, depression, and fever.
• While historically considered fatal, recent advancements, including antiviral treatments, have shown promise in managing or even curing FIP.
• Stress may play a role in susceptibility, making proper care and a calm environment crucial.
• A positive FCoV test does not mean your cat has or will develop FIP.
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🐾 Positive Coronavirus Test ≠ Sick Cat or FIP 🐾
Just because your kitten tests positive for FCoV doesn’t mean they are sick, or will develop FIP, or that it’s the breeder’s fault. Many cats carry these viruses at some point in their lives and remain perfectly healthy. Understanding the facts and the role of stress can help you care for your kitten with confidence.
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Let’s Talk About FIP and the FIP Vaccine 💉
Very important educational information for feline owners:
FIP Facts:
• There is currently no definitive test to diagnose FIP. Antibody levels or titers to coronavirus only indicate prior exposure, not FIPV infection.
• Only a small percentage of cats exposed to FCoV (FeCV) develop FIP, which can occur weeks, months, or even years after initial exposure.
• Preventing FIP requires preventing FCoV infection, which is challenging due to its widespread presence.
• Any cat—pedigree or domestic—can develop FIP if the virus mutates in that individual. Even the best cattery or shelter cannot guarantee prevention.
FIP Vaccine:
• Not recommended at 16 weeks; most kittens have already been exposed to FCoV.
• Found to be largely ineffective and may increase mutation risk in some cases.
• Stress reduction, proper hygiene, and careful monitoring are more effective ways to support kitten health.
Treatment:
• FIP is treatable if caught early, using injections or oral antiviral medications.
• Treatment can be lengthy and costly but can save your cat.
• Choose a veterinarian experienced in FIP treatment; it is not a guaranteed death sentence.
For more information: ICatCare FIP Advice
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💡 Stress Matters: A Key Factor in Kitten Health
Moving to a new home, meeting new pets, or sudden changes in environment can introduce, or trigger flare-ups of FCoV or digestive upset.
Reducing stress is one of the most important things an owner can do:
• Maintain a calm, quiet environment during the adjustment period.
• Provide a secure space with familiar bedding and toys.
• Avoid overhandling or exposing kittens to large groups of people or pets too soon.
• Follow quarantine and vet visit guidelines carefully.
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🐾 Why Daily Lysine Supplementation Helps
• Supports immune health, especially during stress, moving, or after vaccinations.
• Beneficial for exotic and pedigreed breeds.
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Common Misunderstandings About Cat Health
✅ Stress-Induced Health Issues – Stress can cause diarrhea, behavioral changes, and make kittens more susceptible to viral flare-ups. Quarantine and calm environments help.
✅ Quarantine and Vet Visits Are Essential – Immediate vet care protects your kitten and health guarantees.
✅ Not Every Cat With Coronavirus Will Develop FIP – Only a small percentage are affected. Avoid vets using fear to push unnecessary testing.
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Dealing with Misinformation
✅ Unnecessary Products and Services – Ask for evidence-based reasoning for tests or medications.
✅ Bias Against Breeders and Pedigree Cats – Responsible breeders maintain high health standards; don’t let anyone shame your choice.
✅ Second Opinions Are Valuable – Consult vets more familiar with cats if something doesn’t feel right.
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🐾 Tips for Setting Your Kitten Up for Success
1. Respect quarantine (7–14 days)
2. Prompt vet visits
3. Daily lysine supplementation
4. Follow breeder guidelines
5. Limit early exposure to other animals
6. Minimize stress during adjustment
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🐾 Final Thoughts
Raising healthy kittens requires dedication, proper care, and stress management. Follow breeder advice, quarantine protocols, and veterinary guidance.
🚫 Avoid scare tactics or unnecessary procedures
✅ Research, ask questions, and advocate for your cat
🐾 Communicate openly with your breeder—they are there for you; don’t shift blame and attack your breeder
Everyone—breeders, owners, and veterinarians—should work together to prioritize a cat’s health and happiness.
Sources: https://www.elwoodvet.net/coronavirus-in-cats
https://aeroclave.com/feline-coronavirus-what-you-need-to-know/?cn-reloaded=1
