Petco Text Logo
Petco Pet Logo

Why does my 5-month-old Lab puppy have diarrhea every evening?

Updated On September 23rd, 2025

Pet's info: Dog | Labrador Retriever | Male | neutered | 5 months and 19 days old | 40 lbs

Why my 5 month old black lab always gets diarrhea, especially in the evening? Thanks

1 Answer

Most Helpful Answer

Image profile

Answered By Laura Johnson VMD

Veterinarian

Published on September 21st, 2017

Hi, thanks for using Petco Pet Education Center, formerly Petcoach! Causes of diarrhea are: intestinal parasites, viral or bacterial infections, dietary discretion, food allergies or food sensitivities. If Fred is up to date on vaccines and has had a fecal sample run recently then I would suggest a probiotic and consider changing his puppy food to a novel protein diet. The most common allergic protein in dog food is chicken. I would suggest changing him to duck, venison or a fish based diet. Eliminate all human table food and all treats that are not made up of the new protein. Diet trials can take 2-3 months to see if they work. I like Purina Fortiflora for a probiotic. If a fecal has not been run by your Vet, drop one off to have it checked. I hope this helps and good luck!

Vote icon

1Pet Parents found this answer helpful

image
Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Sponsored