FIP in Cats: 8 Symptoms, Survival Rate, Treatment and Recovery Guide
Feline Infectious Peritonitis (FIP) is a serious viral disease in cats caused by a mutated feline coronavirus. This disease was once considered almost always fatal, but newer antiviral treatments have significantly improved survival rates. Early diagnosis and treatment greatly increase recovery chances.
Key Takeaway
• FIP is caused by a mutated feline coronavirus
• Wet and dry FIP have different symptoms
• FIP was previously fatal but treatment options now exist
• Early diagnosis improves survival chances
• Cats showing breathing difficulty, weakness, or abdominal swelling need urgent veterinary assessment
What is FIP in cats? Types of feline infectious peritonitis
This viral condition is a dangerous viral disease caused by a mutated feline coronavirus. It develops when a common feline enteric coronavirus (FECV) changes inside a cat’s body into feline infectious peritonitis virus (FIPV).
Although many cats are exposed to feline coronavirus, only a small percentage is develop.
In cats, there are two primary forms of feline viral condition :
| Type of FIP | Common Symptoms | Why Paw Parents Should Watch Closely |
| Wet (Effusive) | Swollen abdomen, breathing difficulty, fluid buildup in chest or abdomen, low energy | Symptoms may progress quickly and become serious |
| Dry (Non-effusive) | Weight loss, persistent fever, eye changes, neurological signs, reduced appetite | Symptoms can appear gradually and may be harder to recognize |
Wet (Effusive) Feline Infectious Peritonitis
This form causes fluid buildup in the abdomen or chest. Paw parents may notice a swollen belly, breathing difficulties, reduced appetite, or low energy levels.
Dry (Non-effusive) Feline Infectious Peritonitis
This conditions affects organs such as the brain, eyes, liver, and kidneys. Cats with dry FIP may develop persistent fever, weight loss, neurological signs, or changes in vision.
What Are the Early Signs of Infected Cats?
Early symptoms of feline infectious peritonitis can develop gradually and may initially appear similar to other illnesses. Signs vary depending on the organs involved and the form of feline virus.
Common early signs include:
- Persistent or recurring fever
- Loss of appetite
- Weight loss
- Reduced activity or lethargy
- Swollen abdomen from fluid buildup
- Rapid breathing or breathing difficulty
- Eye inflammation or vision changes
- Wobbling, tremors, or seizures
Many paw parents mistake these symptoms for minor illness at first. Because these symptoms can worsen over time, early veterinary assessment may improve treatment outcomes.
What We Commonly See in Clinical Practice
At Starlight Veterinary Hospital, our veterinarians occasionally see cats brought in for signs such as reduced appetite, ongoing fever, low energy levels, or abdominal swelling. Many paw parents initially believe these symptoms are minor and may improve on their own. In some cases, delayed assessment can make diagnosis more challenging if the condition continues progressing.
How Do Cats Get FIP?
Cats usually become exposed to feline enteric coronavirus (FECV) through close contact with infected environments. Common sources include:
- Shared litter boxes
- Contact with infected feces
- Grooming between cats
- Shared food and water bowls
- Multi-cat households
Most cats exposed to feline coronavirus never develop FIP. The disease develops only when the virus mutates within the cat’s body.
When Should You Bring Your Cat to a Vet for FIP Symptoms?
Cats showing persistent fever, loss of appetite, weight loss, breathing difficulties, abdominal swelling, eye inflammation, or sudden neurological signs such as wobbling or seizures should be assessed by a veterinarian as early as possible. While these symptoms do not always mean feline infectious peritonitis, they may indicate a serious underlying condition that requires medical attention.
Many early FIP symptoms can resemble common illnesses, causing paw parents to delay seeking care. However, symptoms may gradually worsen over time, making early evaluation important for timely diagnosis and treatment planning.
What We Commonly See in Clinical Practice
At Starlight Veterinary Hospital, our veterinary team occasionally sees cats presented with ongoing fever, reduced appetite, low energy levels, abdominal swelling, or unexplained breathing changes. Because these signs can overlap with several medical conditions, further assessment may be needed to determine the underlying caus
Clinical evaluation for suspected virl infection, cases may include:
- Physical examination
- Blood tests
- Diagnostic imaging such as X-rays or ultrasound
- Ongoing monitoring and supportive care
Early veterinary assessment may help identify concerns sooner and guide the next steps for your cat’s care.
If your cat is showing unusual symptoms, appointments can be scheduled through the Pet Universe app for a smoother consultation process.
FAQ
What owners actually ask?
Can cats survive FIP?
Yes. Many cats now survive FIP with antiviral medications such as GS-441524 and early veterinary treatment. Survival depends on disease severity and treatment timing
Is FIP contagious?
FIP itself is not directly contagious, although feline coronavirus can spread between cats.
How long can cats live with untreated FIP?
Without treatment, survival may be only days to weeks depending on disease type.
Can FIP be cured?
New antiviral medications have changed outcomes dramatically and many cats can recover.
