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My dog has chronic diarrhea with mucus. What's causing this problem?

Updated On September 23rd, 2025

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

Hello My dog is a bichon cross/Shit Tzu age 1 year and 4 months. He has suffered with bouts of diarreah all of his life, followed by severe mucus poo. He has had multiple doses of antibiotics and treatment still to know avail. Including special dietary change on prescription. The bouts happen every 1 to 2 months

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1 Answer

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Answered By Jennifer Summerfield, DVM CPDT-KA

Veterinarian, Certified Dog Trainer

Published on May 13th, 2017

Poor Dave! Chronic GI issues like this can be very frustrating. In many cases, some diagnostic testing may be needed to help determine what the problem is so that he can be treated effectively. I'm not sure what kind of work-up may have already been done in Dave's case, but some tests that may be helpful to diagnose the cause of his intermittent diarrhea issues would include a GI blood panel to check for problems like chronic pancreatitis, EPI (exocrine pancreatic insufficiency), or inflammatory bowel disease. A fecal diarrhea panel could also help, as this screens for a number of different parasites and are difficult to diagnose on a regular fecal exam at your vet's office. General blood work, x-rays +/- ultrasound, and even exploratory surgery for biopsies of the intestinal tract could also be considered. I would suggest talking with your veterinarian about what he/she recommends as the next step for Dave at this point, since he doesn't seem to be responding well to his current treatment plan. If your vet doesn't have any suggestions, you could also request referral to an internal medicine specialist for further work-up.

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