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My dog has bloody poop after new food. Is it a diet change issue?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male | neutered | 25 lbs

Bloody diarrhea. a few drops of bright red blood after bowel movement. Would this be caused by a recent diet change: we switch to new food within the month. He was fine for the first 2 weeks on new food. Energy levels are normal. No vomiting.

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3 Answers

Most Helpful Answer

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

Veterinarian

Published on August 29th, 2021

Hi and thanks for your request regarding TIllman. These signs could be compatible with a colitis, which is an inflammation of the last part of the intestine, the colon, usually related to dietary indiscretion. As a first approach, I would suggest to start feeding with a bland diet based on boiled chicken and rice in small portion every 6 hours for the following 48hours. Then gradually reintroduce the normal diet over 5 days. Add a probiotic (like Pro-kolin for example) as this can help to speed up the recovery. I would definitely recommend a veterinary check up if the signs persist or you notice vomiting, lethargy or inappetence. 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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Other Answers

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    Answered By Lindsey Edwards MVB, BSc, IVCA

    Veterinarian

    Published on May 16th, 2017

    Changes in diet often causes bowel upset, especially if changed rapidly - it is best to introduce new diets over 5-7days. A probiotic fiber supplement such as fortiflora is recommended, your vet may also be able to provide symptomatic relief

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    Answered By Susan England-Foster

    Veterinarian

    Published on July 15th, 2017

    If both dogs have bloody stool it is possible that the food change upset their stomach. However I would check for parasites too. Parasites are contagious between dogs and sometimes giardia is hard to detect. You can try an over the counter probiotic for a few days with the bland diet of boiled chicken and white rice. If not improving I recommend seeing a veterinarian for possible medications to resolve the issue.

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