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  • Writer's pictureDorota Fraczek

Cats and Diarrhea

Updated: Jan 18

Diarrhea in cats can be a common issue that pet owners face, ranging from mild, transient episodes to more severe, chronic conditions. Understanding the causes, treatment options, and dietary management is crucial for effective resolution and prevention. This detailed guide offers a professional perspective on addressing feline diarrhea.

Causes of Diarrhea in Cats

Feline diarrhea can stem from a variety of causes, often falling into one of the following categories:

Dietary Issues

  • Food Intolerance or Allergies: Certain ingredients in cat food can trigger allergic reactions or intolerance, leading to diarrhea.

  • Sudden Dietary Changes: Rapid changes in diet can upset a cat’s digestive system.

  • Spoiled Food: Consumption of spoiled or toxic foods can cause gastrointestinal upset.

Infectious Agents

  • Parasites: Such as Giardia, roundworms, or hookworms.

  • Bacterial Infections: Like Salmonella or E. coli.

  • Viral Infections: Including feline panleukopenia or coronavirus.

Medical Conditions

  • Inflammatory Bowel Disease (IBD): Chronic condition causing inflammation of the intestines.

  • Hyperthyroidism: Especially in older cats, can cause increased appetite and diarrhea.

  • Liver or Kidney Disease: Can lead to digestive issues, including diarrhea.

Other Factors

  • Stress: Can disrupt normal digestive function.

  • Medications: Certain medications can cause diarrhea as a side effect.

Diagnosing the Cause of Diarrhea

A thorough veterinary examination is essential to determine the cause of diarrhea, which may include:

  • Fecal Examination: To check for parasites.

  • Blood Tests: To rule out underlying diseases like hyperthyroidism, liver, or kidney issues.

  • Food Trials: To identify food allergies or intolerances.

  • Imaging Studies: Such as X-rays or ultrasounds, if a physical obstruction or tumor is suspected.

  • Endoscopy or Biopsy: Especially in chronic cases to evaluate for IBD.

Treatment Approaches

Treatment for feline diarrhea depends on its cause:

Dietary Management

  • Fiber Modification: Some cats respond well to increased fiber, while others need a low-fiber diet.

  • Highly Digestible Diet: Easily digestible foods can help soothe the digestive tract.

  • Limited Ingredient Diets: Useful for identifying food allergies.

  • Probiotics: Can help restore normal gut flora.


  • Antiparasitics: If parasites are identified.

  • Antibiotics: For bacterial infections, though used judiciously to avoid disruption of normal gut flora.

  • Anti-inflammatory Drugs: For conditions like IBD.

  • Other Medications: Depending on the underlying cause (e.g., drugs for hyperthyroidism).

Supportive Care

  • Hydration: Ensuring adequate water intake is crucial, especially if the cat is dehydrated.

  • Electrolyte Balance: Supplements might be needed in cases of severe diarrhea.

Home Care

  • Gradual Diet Changes: Any dietary transition should be done slowly over several days.

  • Monitoring: Close observation of the cat’s behavior, appetite, and stool consistency.

Preventive Measures

  • Regular Parasite Control: Routine deworming and fecal exams.

  • Stress Reduction: Providing a calm environment.

  • Regular Veterinary Check-ups: Early detection of potential issues.


Diarrhea in cats can be a symptom of various underlying issues, ranging from dietary indiscretions to serious medical conditions. Accurate diagnosis and appropriate treatment, along with careful dietary management, are key to resolving and preventing future episodes. It’s crucial for cat owners to work closely with their veterinarian to determine the best course of action based on the individual cat’s needs and health status. Understanding and addressing the root cause of diarrhea is essential for maintaining the overall health and well-being of the feline companion.

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