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My 4-month-old puppy's diarrhea won't stop after diet changes.

Updated On September 23rd, 2025

Pet's info: Dog | French Bulldog | Female | unspayed | 4 months and 16 days old

Hi my puppy is 4 months old has had all her needless in the course of the last 2 weeks she has had diarrhea she had a change in her diet because she started with royal canine when I brought her home from the breeder then I change her to supercoat she was not eating it so went back to original food has not made any difference please help.

1 Answer

Most Helpful Answer

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Answered By Dr. Heidi DVM, CVA, CCRT, CVTP, CVSMT, CVCH

Veterinarian, Certified Veterinary Acupuncturist, Certified Canine Rehabilitation Practitioner

Published on April 17th, 2018

The most common reason that we will see diarrhea in a puppy is some type of intestinal parasite. You didn't mention if your vet has checked a stool sample, but puppies can commonly have intestinal parasites. Some are microscopic, so the only way to know that they have them is for your vet to look under the microscope. And even if a puppy has been dewormed, it is common for them to have other intestinal parasites since there are no many different types of parasites and they each require a specific type of deworming. So, my first recommendation is to have your veterinarian do a fecal check on Chloe, then decide on any other treatment. In the meantime, if she is eating and drinking normally, we will often recommend a bland easily digested diet consisting of ½ cooked white rice and ½ cooked white meat chicken (boiled without any skin or bones). If she does well with a bland diet and her diarrhea resolves, then you can slowly transition back to her normal diet over a few days. Diarrhea that continues for more than a few days, or is associated with blood in the stool, vomiting, lethargy or a poor appetite is a reason for a visit to your veterinarian. There are anti-diarrheal medications that your veterinarian can prescribe. Sometimes puppies need a probiotic for their intestinal tract depending on their age and diet history, so be sure to talk to your veterinarian about that as well. I have attached a couple of links below with more information for you. Petco Pet Education Center, formerly Petcoach.co/article/most-common-causes-of-diarrhea-in-dogs/ Petco Pet Education Center, formerly Petcoach.co/article/6-things-you-can-do-at-home-if-your-pet-has-diarrhea/ Good luck! I hope that was helpful and that she feels better soon. Thanks for using Petco Pet Education Center, formerly Petcoach.

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