Petco Text Logo
Petco Pet Logo

Why won't my 8-week-old Shih Tzu puppy eat after changing food?

Updated On September 23rd, 2025

Pet's info: Dog | Shih Tzu | Male | unneutered | 2 months and 4 days old | 3 lbs

Why 8 week old shihtzu won’t eat at all we recently got him the previous owner was feeding him adult food we started giving him puppy food he was fine yesterday eating well but today he just won’t eat has not ate since yesterday

1 Answer

Most Helpful Answer

Image profile

Answered By Sarah Derksen, DVM

Veterinarian

Published on November 24th, 2018

Hi. Poor baby :( That definitely is concerning especially for a puppy. There are obviously alot of causes for not eating. It could range from parasites, to dietary indiscretions, to viral infection (parvo), and many other illnesses. I would recommend getting Jax seen tomorrow at your vet or the ER because puppies can get dehydrated, hypoglycemic and decompensate quickly. They will do an exam, a parvo test, and a fecal to start most likely. 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