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My 9-week-old puppy won't eat and keeps throwing up. Is it serious?

Updated On September 23rd, 2025

Pet's info: Dog | Mastiff | Male | unneutered | 2 months and 12 days old | 20 lbs

9 week old puppy not eating and when he does he pukes it up

1 Answer

Most Helpful Answer

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Answered By Christie Long, DVM

Veterinarian, Certified Veterinary Acupuncturist

Published on November 12th, 2016

This could be a number of things - parasites, a bacterial or viral GI infection, or even an intestinal blockage. At 2.5 months of age, Gus is especially at risk for parvovirus, a serious GI infection. We always worry about fluid loss in young puppies, so I would recommend getting him to a vet ASAP, to diagnose the cause of the vomiting, and start appropriate therapy.

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