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What causes sudden death in puppies with nose and mouth bleeding?

Updated On September 23rd, 2025

Pet's info: Dog | Siberian Husky | Female | spayed | 1 month and 28 days old | 60 lbs

I had a puppy and he was only 2 months old. Extremely playful and was like any other puppy. He suddenly started throwing up and stopped breathing then began to bleed from his nose and mouth. I took him to the animal clinic, he was gone by the time I arrived, but they failed to give any reason why this suddenly would happen even though seconds before he was playing with his sister who is fine, alive, and healthy. If you can think of any reason this happened randomly, it'll be much appreciated.

2 Answers

Most Helpful Answer

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Answered By Jennifer Summerfield, DVM CPDT-KA

Veterinarian, Certified Dog Trainer

Published on April 10th, 2017

I'm so sorry for the loss of your puppy! How awful. Given that he was bleeding from the nose and mouth after he passed away, I would be concerned that he may have gotten into something toxic such as rat poison, or may have had a systemic bleeding disorder of some kind. A sudden heart problem could also potentially cause bloody fluid or foam to come from the nose and mouth after death. The only way to know for sure would be to ask your vet to perform an autopsy (called a necropsy in animals) to try and determine a more definite cause of death. Again, I'm very sorry for your loss.

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    Answered By Dr. Melanie, BVSc MS

    Veterinarian

    Published on

    Oh no, how horrible for you! I'm so sorry that you suddenly lost Winston, that is a terrible thing for you to have to experience. Without seeing him in person, please keep in mind that I can't say for certain what caused him to pass away, but I can take a guess. I would concerned that he may have gotten into something toxic such as rat poison causing this sudden bleeding. He could have also have an undiagnosed bleeding disorder. The best way to know what caused him to lose his life would be to have a necropsy (an autopsy for animals) done on him by your vet. Again, I'm so sorry for your loss :-(

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