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🐾 Understanding FIP in Cats: What Every Owner Should Know

  • Writer: Julia Kovalenko
    Julia Kovalenko
  • Dec 9, 2025
  • 1 min read

What is FIP?

FIP, or Feline Infectious Peritonitis, is a disease caused by a mutation of the common feline coronavirus (FCoV). Most cats are exposed to feline coronavirus at some point in their lives, and in the vast majority of cases it causes no illness or only mild digestive upset. Only in rare cases does the virus mutate inside the cat’s body and develop into FIP.


Is FIP contagious?

No. FIP itself is not contagious. While the feline coronavirus can pass between cats, the dangerous mutation that causes FIP happens inside an individual cat and cannot be transmitted from one cat to another. This means that if one kitten develops FIP, it does not mean their siblings or parents are automatically at risk.


Is FIP genetic or a breeder’s fault?

Scientific studies have shown that FIP is not considered a genetic disease and is not caused by poor breeding practices. It is an unfortunate and unpredictable condition that can occur in any breed, even among the healthiest and most well-cared-for kittens. Responsible breeders work hard to provide the best environment and care, but no one can prevent the rare chance of FIP mutation.


What should owners know?

FIP is very rare but can be heartbreaking.

It usually develops in kittens under two years of age.

Research and treatment options are improving, and some cats can now recover with proper medical support.



Takeaway: FIP is not anyone’s fault. It is important for new kitten owners to be informed, but also reassured that it is an uncom

mon condition, and not a reflection of their care—or their breeder’s.

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