Pet Health

Vomiting and diarrhoea in cats

Learn the causes, symptoms, and treatments for vomiting and diarrhoea in cats. Keep your feline healthy with our friendly guide to common digestive issues!
Author: Veterinary Team
Dial A Vet
Updated
June 6, 2025
|
Published
June 6, 2025
A concerned cat owner holds a sick cat while researching vomiting and diarrhoea symptoms on a laptop.

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It's alarming to see your cat vomiting or suffering from diarrhea. You might be wondering: Is it something they ate? Could it be a sign of a serious illness? As a cat parent, you want to ensure your feline friend feels better quickly and safely. Let's explore the potential causes, what you can do to help, and when it's time to seek veterinary care.

⚠️ What to Watch For

Vomiting and diarrhea are symptoms, not diseases, and they can range from mild to severe. Monitoring your cat's behavior and symptoms is key to understanding what might be going on.

Here are some signs to look out for:

  • Frequency: Occasional vomiting or diarrhea may not be concerning, but repeated episodes within 24 hours need attention.
  • Appearance: Is the vomit clear, foamy, or does it contain food? Is the diarrhea watery, bloody, or mucus-filled?
  • Other symptoms: Lethargy, lack of appetite, weight loss, or dehydration can signal a more serious issue.
  • Duration: If symptoms persist for more than 24–48 hours, it’s time to act.

Knowing these details can help your vet diagnose the problem faster and recommend the best treatment.

🔍 Possible Causes

There are many reasons why your cat might experience vomiting or diarrhea. Some are mild and easily resolved, while others require urgent medical attention. Here are the most common causes:

  • Dietary indiscretion: Cats are curious eaters, and consuming spoiled food, plants, or even non-food items (like string or plastic) can upset their stomach.
  • Food allergies or intolerances: Some cats may react poorly to certain ingredients in their diet, such as dairy, grains, or specific proteins.
  • Parasites: Intestinal worms, such as roundworms or tapeworms, are a common culprit.
  • Infections: Viral or bacterial infections, like feline panleukopenia or salmonella, can cause gastrointestinal upset.
  • Toxins: Ingesting toxic plants (like lilies), human medications, or household chemicals can lead to severe vomiting or diarrhea.
  • Chronic conditions: Issues like inflammatory bowel disease (IBD), kidney disease, or hyperthyroidism can manifest with these symptoms.
  • Hairballs: Cats groom themselves meticulously, and excessive hair ingestion can sometimes lead to vomiting.

Determining the root cause often requires a thorough history, physical exam, and sometimes diagnostic tests like bloodwork, X-rays, or stool analysis.

✅ What You Can Do at Home

If your cat is otherwise acting normally (eating, drinking, and playing), you can try some home care measures to see if the symptoms resolve:

  • Temporary fasting: Withhold food for 12–24 hours (for adult cats only, not kittens) to give their digestive system a break.
  • Hydration: Offer plenty of fresh water to prevent dehydration. You can also provide a small amount of diluted, unseasoned chicken broth.
  • Bland diet: After the fasting period, reintroduce food slowly with a bland diet like boiled chicken and plain rice or a vet-recommended gastrointestinal diet.
  • Monitor for improvement: Keep an eye on their symptoms and behavior. If they start eating and their stools normalize, it may have been a minor upset.

While these steps can help in mild cases, remember that cats are masters at hiding illness. If you're unsure, it's always better to check with a vet.

💡 When to Call a Vet

Some situations require immediate veterinary attention. Contact your vet or a telehealth service like Dial A Vet if you notice any of the following:

  • Persistent vomiting or diarrhea lasting more than 24–48 hours
  • Blood in vomit or stool
  • Severe lethargy or weakness
  • Signs of dehydration (e.g., dry gums, sunken eyes, or skin that doesn't bounce back when pinched)
  • Known ingestion of a toxic substance
  • Weight loss or lack of appetite
  • Symptoms in a kitten, senior cat, or a cat with a pre-existing health condition

Your vet may recommend diagnostic tests or treatments like fluid therapy, anti-nausea medication, or prescription diets to help your cat recover.

FAQs

Q: Can I give my cat over-the-counter medications for vomiting or diarrhea?
A: No, many human medications are toxic to cats. Always consult a vet before giving your cat any medication.

Q: How can I prevent vomiting and diarrhea in my cat?
A: Feed a high-quality, consistent diet, keep toxic foods and plants out of reach, and schedule regular vet check-ups to catch any underlying issues early.

Book a $49 online vet consultation at https://www.dialavet.com for fast, expert advice.

References

While every effort is made to ensure the accuracy of this content - including vet review where applicable - this article is for informational purposes only and is not a substitute for professional veterinary advice, diagnosis, or treatment. If your pet is unwell or you are concerned, please speak with a licensed veterinarian. You can book a $49 online consultation with our veterinary team  😄
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