Irritable Bowel Syndrome in Cats

2 min read

Chronic Irritation in the Lining of the Bowels in Cats

Irritable bowel syndrome is commonly associated with chronic inflammation and discomfort of an animal's bowels, but is not linked with any type of gastrointestinal disease. It is not always known what underlies irritable bowel syndrome, but some of the suspected causes are thought to be related to diet intolerances, possibly due to allergies, the ability of the food to effectively pass through the gastrointestinal tract, and mental distress.

Symptoms and Types

The most common symptoms of irritable bowel syndromes is chronic, occasional large bowel diarrhea, including frequent passage of small amounts of feces and mucus, and constipation (dyschezia). Abdominal pain, bloating, vomiting, and nausea may also occur. Some abdominal pain may be present upon touching the cat's abdominal area as well.


Some potential causes of irritable bowel syndrome include:

  • Abnormal colonic myoelectrical activity and motility
  • Dietary fiber deficiency
  • Dietary intolerances
  • Stress, although not in all cases
  • Changes in neural or neurochemical regulation of colonic function


You will need to give a thorough history of your cat's health, onset of symptoms, and recent activities, after which your veterinarian will perform a thorough physical exam on your cat, taking into account the background history of symptoms and possible incidents that might have led to this condition. This will help him or her rule out all other potential causes of large bowel diarrhea, including:

  • Whipworms
  • Inflammation of the colon (inflammatory colitis)
  • Clostridium perfringens (bacterial infection)
  • Fiber-responsive large bowel diarrhea
  • Dietary indiscretion or intolerance
  • Giardiasis
  • Histoplasmosis
  • Pythiosis
  • Colonic neoplasia (mass or tumor of the colon)
  • Cecal inversion (abnormal turning of the intestine)

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