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My dog keeps vomiting and won't eat after vet treatment, what's wrong?

Updated On September 23rd, 2025

Pet's info: Dog | Great Pyrenees | Male | neutered | 1 year and 8 months old | 85 lbs

My dog lost a lot of weight. Then after was bit by a copperhead. I took him to the vet. He gave him fluids and vomiting shot. He got worse. Alo has been vomiting and no appetite.he gave him prednazone and more vomiting meds. Was better for a few days but now is vomiting again and no appetite.

1 Answer

Most Helpful Answer

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Answered By Ricardo Fernandez, DVM

Veterinarian, Veterinary Oncology Resident

Published on July 17th, 2018

Thanks for using Petco Pet Education Center, formerly Petcoach! Vomiting and inappetence can occur from many conditions such as foreign body ingestion and obstruction, pancreatitis, gastroenteritis, inflammatory bowel disease, dietary indiscretion, among other possibilities. Given the brief improvement on steroids, I think a condition like inflammatory bowel disease is likely. I recommend that you have Ceasar evaluated by your veterinarian for further assessment and treatment. This will likely require bloodwork and abdominal imaging in terms of diagnostics. Treatment would be based on findings. At the very least your veterinarian could start him on medications to make him feel better. In the meantime, keep water available at all times to try to prevent dehydration. Good luck and have a good day!

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