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My Frenchie puppy has mushy poop. How can I firm up his stool?

Updated On September 23rd, 2025

Pet's info: Dog | French Bulldog | Male | unneutered | 2 months and 3 days old | 9 lbs

I have a 9 week old Frenchie puppy at 8 weeks he was taken to the vet and they mentioned he had loose stool and was otherwise healthy. I’ve been watching his poop and it hasn’t been watery like diarrhea but it varies from slightly soft logs to mushy piles. I tried adding a little pumpkin and rice to his food and it seems it’s only gotten mushier. He hasn’t acted sick and the poop isn’t mucusy, bloody or dark so I don’t think isn’t an emergency situation but how can I help him firm up his stool.

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4 Answers

Most Helpful Answer

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Answered By Penelope Graben, DVM

Veterinarian

Published on December 14th, 2020

Hello, I would recommend picking up some probiotics from your vet to help repopulate his gut with good bacteria. Common ones are called Fortiflora and Proviable, but there are other fine brands as well. Also ensure that Chicharon has been dewormed recently. Most areas recommend giving puppies general deworrmer every two weeks during the first four months of life. You can also pick up some prescription canned gastrointestinal food from your vet made to be easy on the belly. Plain rice and pumpkin are also fine choices though. A bit of loose stool is common for dogs in a stressful situation, such as moving to a new home, so this may be a short lived situation. I hope this helps. Thanks for using Petco Pet Education Center, formerly Petcoach. Congrats on your new pup Chicharon.

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    Answered By Laura Johnson VMD

    Veterinarian

    Published on April 4th, 2018

    Hi, thanks for using Petco Pet Education Center, formerly Petcoach! I would try to phase out the formula and just feed him the puppy food. Do canned food for 1 week, then canned mixed with dry for 1 week, then dry food that you can wet with water if needed thereafter. Formula can really affect the stool, either diarrhea or constipation. If doing that doesn't improve the stool then I would change brands of puppy food. Purina is a great brand but not all dogs digest foods the same. be sure you are deworming him and have him set up around 7-8 weeks for his first vaccines. I hope this helps!

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    Answered By Dr. Dayna, DVM, CVA

    Veterinarian, Certified Veterinary Acupuncturist

    Published on October 5th, 2017

    I would plan to take him to your appointment tomorrow and let your veterinarian guide you. If they feel he is sick enough to wait on vaccinations they will let you know. You may want to discuss diet at the appointment as well, at 6 weeks old they shouldn’t really need milk anymore. Maybe that’s causing the loose stool? Of course intestinal parasites are common problems in young dogs as well. Good luck! I hope he improves quickly!

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    Answered By Angel Alvarado, LVT

    Licensed Veterinary Technician

    Published on October 3rd, 2017

    Submit a stool sample to your veterinarian to diagnose intestinal parasites or bacterial overgrowth. Puppies require several dewormings to clear parasite infections. A SNAP test can be done in the clinic to rule out parvovirus infection. Cerelac contains grains which can be healthy, but puppies need protein. Offer an appropriate puppy milk replacer such as Esbilac or PetLac instead. You can mix it with a quality puppy food to make a slurry or gruel. Continue with the electrolyte replacement beverage to prevent mild dehydration. Recheck with your vet if the soft stool does not resolve.

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