Cat Diarrhea: Symptoms, Causes and Treatment
Cat diarrhea can catch any pet owner off guard, turning what seemed like a regular day into a moment of concern. Whether it’s a sudden change in your cat’s litter box habits or recurring episodes, this condition often leaves owners wondering what’s causing the issue and how to address it. While some cases are minor and resolve quickly, others may signal a more serious problem that requires professional attention. If your cat is experiencing diarrhea, the team at Emergency Veterinary Care Centers is here to help. Contact one of our locations today for expert care and guidance tailored to your pet’s needs.

Symptoms of Cat Diarrhea
Diarrhea in cats isn’t always immediately obvious, especially for owners of outdoor cats or those who share a litter box with multiple pets. However, recognizing the signs of diarrhea can help you take quick action when necessary. Some common symptoms include:
- Frequent or loose stools: This is the most noticeable symptom and may vary in consistency, from soft to completely liquid.
- Change in stool color: Cat diarrhea can range from brown to green, yellow, or black, depending on the underlying cause.
- Straining to defecate: Cats with diarrhea may appear to strain or experience discomfort while using the litter box.
- Accidents outside the litter box: A cat with diarrhea may be unable to make it to their litter box in time, leading to accidents around your home.
- Loss of appetite: Diarrhea is often accompanied by a reduced interest in food.
- Dehydration or lethargy: Severe or prolonged diarrhea can cause dehydration, leading to fatigue and other health issues.
What Are Some Causes of Cat Diarrhea?
Diarrhea in cats can result from a wide range of causes, from minor dietary issues to more serious health concerns.
Dietary Indiscretion
A sudden change in diet or consuming inappropriate foods can upset a cat’s digestive system. Table scraps, spoiled food, or even a new brand of cat food may trigger diarrhea.
Parasites
Intestinal parasites such as roundworms, hookworms, or Giardia are frequent culprits, especially in kittens or cats with outdoor access. These parasites irritate the gastrointestinal tract and can cause chronic diarrhea.
Infections
Bacterial or viral infections, including Salmonella, E. coli, or feline panleukopenia, can lead to diarrhea in cats. These infections may require medical intervention, particularly if symptoms worsen.
Food Allergies or Intolerances
Cats can develop sensitivities to certain proteins or ingredients in their diet. Common allergens include beef, dairy, and fish, which can lead to gastrointestinal upset.
Chronic Conditions
Underlying health issues such as inflammatory bowel disease (IBD), hyperthyroidism, or pancreatitis can cause ongoing diarrhea. These conditions often require long-term management.
Toxins and Foreign Bodies
Ingesting toxic substances like cleaning chemicals, plants, or human medications can irritate the digestive system and lead to diarrhea. Similarly, swallowing non-food objects may cause blockages or irritation in the intestines.
Stress
Cats are sensitive to changes in their environment, and stress can affect their digestive health. Events such as moving, introducing a new pet, or loud noises can lead to temporary diarrhea.
How Is Cat Diarrhea Diagnosed?
When you bring your cat to your veterinarian for diarrhea, a thorough examination is conducted to pinpoint the cause. Here’s what to expect during the diagnostic process:
- Physical Examination: Your veterinarian will check for signs of dehydration, abdominal pain, or weight loss.
- Fecal Testing: A sample of your cat’s stool will be analyzed for parasites, bacteria, or signs of inflammation.
- Bloodwork: Blood tests can help identify infections, organ dysfunction, or chronic diseases.
- Imaging: X-rays or ultrasounds may be necessary if your vet suspects a blockage or abnormality in the gastrointestinal tract.
- Dietary Review: Providing details about your cat’s diet and any recent changes can help identify potential food-related causes.
Addressing Cat Diarrhea
The treatment for cat diarrhea varies based on the underlying cause. Below are common approaches that your veterinarian may recommend.
Dietary Adjustments
Your vet may suggest a bland diet, such as boiled chicken and rice, to soothe your cat’s digestive system. Prescription diets designed for sensitive stomachs are another option.
Medications
Anti-parasitic medications are prescribed if parasites are detected. In cases of bacterial infections, antibiotics may be necessary. Probiotics can also help restore healthy gut bacteria.
Hydration Support
For cats experiencing significant dehydration, fluid therapy might be required. This can be administered orally, subcutaneously, or intravenously, depending on the severity.
Long-Term Management for Chronic Conditions
If a chronic condition like IBD is diagnosed, your veterinarian may recommend ongoing treatments such as dietary changes, medications, or regular monitoring.
Removing Toxins or Foreign Objects
If a foreign object or toxic substance is involved, prompt removal and supportive care are crucial. This may require hospitalization or surgical intervention in severe cases.
When Should You Contact Your Veterinarian?
While some cases of cat diarrhea resolve on their own, others require prompt medical attention. You should contact a veterinarian immediately if:
- Diarrhea lasts for more than 24–48 hours.
- You observe blood or mucus in the stool.
- Your cat shows signs of severe dehydration, such as sunken eyes or dry gums.
- Vomiting accompanies diarrhea.
- Your cat appears lethargic or in pain.
For expert veterinary care, call Emergency Veterinary Care Centers. We’re available to provide the medical support your cat needs, no matter the time of day. Reach out to one of our locations today.
Supporting Your Cat’s Digestive Health
Preventing diarrhea in cats starts with supporting their overall digestive health. Here are a few tips to reduce the likelihood of future episodes:
- Gradual Diet Changes: When introducing new food, do so gradually over 7–10 days to minimize digestive upset.
- Regular Parasite Prevention: Keep your cat on a consistent deworming schedule as recommended by your vet.
- Safe Environment: Remove access to harmful substances like toxic plants or human medications.
- Stress Reduction: Provide a calm, enriching environment for your cat to lower stress levels.
- Routine Vet Visits: Regular checkups can catch potential health issues before they become severe.
Taking Action for Your Cat’s Health
When your cat experiences diarrhea, understanding the symptoms, potential causes, and treatment options can help you respond effectively. Whether the issue is minor or indicates a larger health concern, contacting your veterinarian ensures your cat receives the care they need. If you notice persistent diarrhea or other concerning symptoms, call Emergency Veterinary Care Centers today. Our team is here to support you and your cat with compassionate and expert care.
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At Emergency Veterinary Care Centers (EVCC), we know that pet emergencies are unpredictable and often stressful. That's why our team, with over 20 years of emergency and critical care experience, is ready to assist you and your pet in the toughest situations.