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Vet Column
2024-11-11

What Causes Feline Infectious Peritonitis (FIP) in Cats? Symptoms and Prevention Tips

 
This article was written by Dr. Shang-Hsiu Chung, a veterinarian at Always Care Veterinary Hospital
 

Feline Infectious Peritonitis (FIP) in cats was once considered an incurable and fatal disease. While treatments are now available, the risk remains, and cat owners should stay vigilant. Signs that your cat may have FIP include sudden loss of appetite, lethargy, fever, a swollen abdomen, and significant weight loss. In this article, a veterinarian explains what FIP is, its symptoms, and the way of prevention.

What is Feline Infectious Peritonitis?

Feline Infectious Peritonitis (FIP) is a fatal disease caused by a mutation of the feline coronavirus. While many cats may carry FCoV without serious illness, only a small number develop FIP due to this mutation. Cats under the age of three are particularly at risk. The exact cause of the viral mutation remains unknown, though some experts believe it may be linked to conditions like feline leukemia and feline AIDS. Additionally, certain breeds, such as Birman cats, are more susceptible to developing FIP.

Analysis of Feline Infectious Peritonitis Symptoms


Symptoms can present in four forms: wet FIP, dry FIP, nervous system disorders, and eye-related symptoms:
  1. Wet FIP

    Accounts for approximately 80% of cases and is characterized by:

  • Fluid accumulation in the abdomen, leading to swelling
  • Fluid accumulatio in the chest, causing difficulty breathing
  1. Dry FIP

    Symptoms of this form are relatively insidious and often include enlargement of the kidneys, liver, intestines, and other internal organs, with nodules or masses that may become visible.
    Other symptoms including:

  • Prolonged fever
  • Loss of appetite
  • Weight loss
  • Low energy and lethargy
  1. Nervous System Disorders

    Although less common, cats may develop serious neurological problems, such as epilepsy, abnormal gait, and loss of balance.

  2. Eye-related Symptoms

    FIP can also impact a cat's vision, leading to gradual vision deterioration and even blindness.

Some of these symptoms can appear rapidly within a few days, while others may persist for weeks to months, making early recognition and medical attention crucial for effective treatment.
 

How to Treat and Prevent FIP

In the past, a diagnosis of FIP was almost equivalent to a death sentence. However, since 2017, new antiviral medications, such as Molnupiravir, have emerged, making FIP no longer an untreatable, deadly disease. Additionally, these medications have been legally approved for clinical use in Taiwan. While treatments are now available, FIP remains a high-mortality risk disease; therefore, prevention is the primary goal for protecting cats.

Methods of Prevention

  • Avoid Coronavirus Infection: While there is no effective vaccine to prevent FIP, the risk can be reduced through regular screening and the isolation of FIP cats.
  • Enhance Immunity: Enhancing a cat's immunity can reduce the risk of infection. It is recommended to supplement cats with lysine, which they cannot synthesize on their own, to boost their resistance, along with providing a nutritionally balanced diet.
  • Relieve Anxiety and Stress: Stress is considered one of the factors that may contribute to coronavirus mutation. Supplementing with health products containing tryptophan and GABA can help stabilize mood and reduce anxiety.
  • Regular Health Check-up: Arranging regular health check-ups for your cats can help detect potential issues early. Coronavirus screening, in particular, allows for a prompt response if needed.
While FIP is concerning, advancements in medicine have provided new treatment methods to combat the disease. Regular veterinary check-ups, along with preventive care, can help reduce the risk of FIP.
For more information on the best health care options for your pet, don't hesitate to contact the WelPet professional team, who are dedicated to serving you.

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Vet Column
2026-11-03

Can Stress Cause Digestive Problems in Dogs and Cats? Understanding the Gut-Brain Axis

Your dog suddenly develops diarrhea even though you haven't changed its food. Your cat starts vomiting more frequently, loses interest in meals, or spends more time hiding than usual. Could stress be part of the problem? Digestive issues in dogs and cats can have many causes, including dietary changes, illness, and environmental stress. While stress is not always the underlying cause, it is an important factor to consider when evaluating changes in your pet's digestive health and behavior. Dogs may become anxious when left alone for extended periods or separated from their owners. Cats, meanwhile, may feel stressed by moving to a new home, rearranged furniture, unfamiliar visitors, or the arrival of another pet. Because pets cannot explain how they feel, recognizing changes in their behavior, appetite, and bowel movements can help owners identify potential concerns early. Excessive barking, repetitive licking, hiding, reduced social interaction, and decreased appetite may indicate stress. When vomiting or diarrhea occurs alongside these changes, it is important to assess the pet's overall health rather than assuming that anxiety is the only cause. The gut is more than a digestive organ. It also communicates with the brain through a complex network of nerves, hormones, immune signals, and microbial metabolites. This two-way communication system, known as the gut-brain axis, helps connect digestive function with the body's stress response. So, can dog anxiety cause digestive problems? How are gut bacteria related to pet behavior? And what can pet owners and pet supplement brands do to support digestive health? Let's explore the gut-brain axis, common stress symptoms in dogs and cats, practical care strategies, and the role of nutritional management.

Vet Column
2026-09-30

11 Essential Amino Acids for Cats: Taurine, Arginine & Lysine

Cats require 11 essential amino acids, including taurine, arginine, lysine, leucine, isoleucine, valine, histidine, methionine, phenylalanine, threonine, and tryptophan, which need to be obtained through their daily diet. Among these, taurine is an especially important nutrient for cats; arginine is involved in protein and nitrogen metabolism; and lysine is an essential component of proteins. Understanding the basic roles of these essential amino acids can help cat owners make more informed choices when selecting cat food and nutritional supplements, while better understanding their cats’ daily nutritional needs.

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