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My dog has constant soft mushy stool. What causes it and what to do?

Updated on September 23rd, 2025

Pet's info: Dog | Chihuahua | Male | neutered | 4 years and 10 months old

What would cause my dog to constantly have soft mushy stool’s He is the same exact food as my other dog who takes fine poops He’s been on antibiotics hes had stool samples there’s no parasites or anything what can I do to find out what’s causing this Are there any specific tests that can be done even benefiber does not help

1 Answer

Most Helpful Answer

Laura Johnson VMD

Answered By Laura Johnson VMD

Veterinarian

Published on November 10th, 2017

Hi, thanks for using Petco Pet Education Center, formerly Petcoach! Poor Tiny!

Even though your other dog handles the food fine doesn't mean that Tiny will. Tiny could have a food allergy causing chronic loose stool. Other possible causes are: pancreatic conditions, inflammatory bowel disease.

The easiest thing to do it to change Tiny's food to an OTC novel protein diet. Chicken is the most common allergic protein. Try a venison or all fish diet. You need to give the diet 2-3 months to decide if it worked or not and you may need to try a prescription diet before determining that Tiny doesn't have food allergies.

If Tylosin hasn't been tried you can discuss that with your Vet and a probiotic. I like Purina Fortiflora.

Inflammatory bowel disease is diagnosed off ultrasound and biopsy. Pancreatic insufficiency is diagnosed from special blood tests (B12, folate, TLI, PLI).

I hope this helps and I wish Tiny the best!
Vote Icon2Pet Parents found this answer helpful

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