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My dog died suddenly after being sick. What could be the cause?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male | 9 lbs

My dog is weak for this past few days. He's a mixed breed. Mini pinscher/ pomeranian. He's all of a sudden, weak and tired of doing anything. He's vomiting and he's loss his appetite. Just this night, he died. And i dont know why. He's just 6 years old. I think it's because of his ticks and fleas? I think it's because of this disease called lyme disease. Is it because of it? Please answer me. I cant help but to be bothered because of my pet's sudden death.

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2 Answers

Most Helpful Answer

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Answered By Emily, DVM

Veterinarian

Published on June 1st, 2017

I'm very sorry for the sudden loss of your dog. With his history I would be suspicious of an infection, heart disease, sudden bleeding or a toxin that could cause death. While Lyme disease can be serious his signs aren't specific for a Lyme infection. For a specific answer tissue and/or body fluid samples as well as a post mortem exam like an autopsy would be needed. However even with those we sometimes cannot pinpoint the exact cause of a sudden death.

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    Answered By Rebecca, DVM

    Veterinarian

    Published on

    I am so sorry for your loss. There is really no way to know why Chuchu died without a post mortem exam. I don't know how many veterinarians you have but if there is one near to you you might ask about having a necropsy done to find a cause of death. Even with a necropsy though, sometime we never know the answer. I am so sorry. Please try to remember and take solace in the good memories of Chuchu

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