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My dog is vomiting & has bloody diarrhea after vet. What's the cause?

Updated On September 23rd, 2025

Pet's info: Dog | Shih Tzu | Male | neutered | 1 year and 8 months old

Jake has not been himself since Sunday. He was clingy then he wouldn’t eat then he was sick and today he’s had runny poop with a little blood in. I have taken him to the vets and they gave him 3 injections. 1 to stop him being sick, 2 to stop the runny poop & 3 an antibiotic. He also gave him buscopan tablets and the sash that are in the pictures. He said we have to go again tomorrow for some more injections. I forgot to ask why within the panic. What could he the reason for him being ill?

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1 Answer

Most Helpful Answer

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Answered By Daniel Fonza, DVM

Veterinarian

Published on November 22nd, 2017

Hi there and thank you for using Pet Coach to address your concern. It is difficult to say what the cause could be as there are many causes of diarrhea and vomiting. If they did not test his blood, I would certainly recommend doing so. This could be from some type of systemic infection, a toxin he potentially ate or something he ate causing these symptoms. Your veterinarian likely wants to see him back for a follow up and additional treatments such as anti-vomiting medications and hydration treatment such as subcutaneous fluids. If there is no improvement, you might consider abdominal x-rays to see if there are any abdominal abnormalities. If Jake is not up to date on all of his vaccinations, then I would also consider testing him for Parvo virus. I hope this helps guide you in the right direction! Please let me know if you have any other questions or concerns.

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