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My dog has bloody diarrhea and vomiting. What should I do now?

Updated On September 23rd, 2025

Pet's info: Dog | English Mastiff | Male | neutered | 8 years old | 150 lbs

I have an 8 year old mastiff who up until this morning was seemingly healthy. He refused to eat his food this morning and had two loose stools as soon as he was let out to go to the bathroom. He has vomited once. Later today he had two liquid stools that were obviously mixed with blood. There have been no dietary changes, no chance of toxin ingestion, and he was vaccinated for parvo as a puppy. He is still alert and drinking normally. What should my next steps be?

1 Answer

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on August 10th, 2019

I can give you a home remedy for Diesel to see if that helps. Withhold food for 12-24 hours, then feed a bland diet of boiled white meat chicken (no bones) and white rice in small amounts several times a day for a couple of days. Then slowly add back in his normal diet. If the diarrhea continues on the bland diet, he starts vomiting food, stops drinking water, starts vomiting water, or becomes very lethargic, he will need to see a vet right away. Best of luck.

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