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My old cat's diarrhea won't stop with home remedies. What to do?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Female | spayed | 6 lbs

Hello, I have a 20 yr old domestic shorthair cat. She has had diarrhea on and off for over a week. I have been giving her Fortiflora and chicken broth w/white rice but no real change. FYI, she is acting, eating, drinking, urinating normally. How do I get her bowel movements back to normal?

4 Answers

Most Helpful Answer

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Answered By Dr. Massimo Orioles, DVM, Cert AVP, MRCVS

Veterinarian

Published on November 5th, 2019

Hi, and thanks for your question. These signs could be compatible with an inflammation infection of the gastrointestinal system and surrounding organs (like pancreas and liver). Considering the persistency of the signs, a clinical examination at your local veterinarian is immediately essential to confirm these clinical suspicions and treat appropriately. Antibiotics and possibly further investigations (like abdominal imaging as ultrasound or radiographs) may be needed. Hope this answer was helpful, but please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further. If this answer was helpful please let us know, this will be used to improve our service!

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    Answered By Laura Johnson VMD

    Veterinarian

    Published on November 18th, 2017

    Hi, thanks for using Petco Pet Education Center, formerly Petcoach! Poor Oswald! There are no safe human medications that you can give cats. Sadly cats are extremely sensitive to human drugs and they just are not safe. Causes of diarrhea in cats: intestinal parasites, viral, bacterial or protazoal infections, food allergy or intolerance, toxin ingestion, inflammatory bowel disease, pancreatitis. Sometimes we never determine the cause. If the diarrhea has been going on for several days and is severe then I would fast him for 12-24 hours then resume feeding. I would drop off a stool sample at your Vet. You can order Purina Fortiflora (probiotic) online or ask if your Vet if they can sell it to you. But if the diarrhea continues or Oswald stops eating and/or starts vomiting he needs to see a Vet for medications. I hope this helps and I wish Oswals a speedy recovery!

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    Answered By Ana M, DVM

    Veterinarian

    Published on September 13th, 2019

    Thank you for submitting your question regarding Marco. I recommend that he sees a veterinarian today. If possible, collect a fresh fecal sample to take to his appointment. I worry that he is dehydrated given the amount of diarrhea you have described. His veterinarian will examine him and likely test his feces for evidence of an infection. Based on these results, treatment can be started to help him feel better. I hope this information helps!

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    Answered By Daniel Fonza, DVM

    Veterinarian

    Published on January 27th, 2018

    Hi there and thank you for using pet coach to address your concern. There are many causes of diarrhea but most commonly diarrhea can be due to the diet or intestinal bacteria. Other causes such as GI inflammatory diseases, cancer or systemic diseases are less common but are all still a possible cause. I would recommend switching to a hydrolyzed protein diet such as Hills Z/D or Royal Canin Ultamino and adding in a probiotic such as Purina fortiflora which can be found online quite easily or at your local pet store. If after 4 weeks of the new diet there is no improvement, I would recommend further testing with a veterinarian such as an abdominal ultrasound. I hope this helps guide you in the right direction. Please let me know if you have any other questions or concerns and I would be more than happy to help you further.

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