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Puppy is vomiting, lethargic, not eating. Parvo negative, what else?

Updated on September 23rd, 2025

Pet's info: Dog | Shih Tzu | Male | unneutered | 4 months and 9 days old | 10 lbs

hi! my 5 month old puppy a few days ago went to the vet bc of lethargy, vomiting, and lack of appetite. they ran tests and he tested negative for parvo and gave me medication and appetite stimulants for him. a few days have passed by and he was doing better but today it’s harder to get him to eat and he threw up twice. he’s been mostly sleeping as well. if it’s not parvo what could it be?

1 Answer

Most Helpful Answer

Jeffrey Milner

Answered By Jeffrey Milner

Veterinarian

Published on April 5th, 2022

Other considerations may include pancreatitis, foreign body in gi tract (partial or complete obstruction), parasites, dietary indiscretion causing gastroenteritis, intussuception, and a few others. All of these would require further testing or evaluation to identify. Because your dog is so small it can easily become hypoglycemic if not eating. As a result, I would recommend seeing your vet or an ER vet if you cannot get in by the morning if symptoms havent inproved significantly. You can rub a little corn syrup or maple syrup on the gums to try and stave off low sugar temporarily. If vomiting becomes more frequent overnight, you shouldn't wait until morning.
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