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My dog died unexpectedly. Could it be lymphoma or bone marrow cancer?

Updated On September 23rd, 2025

I asked a question yesterday and Leann Tana answered it. It was I gave Brewki 100mg of Clavamox and then my husband accidentally give him 100mg of doxycyline . She said it should not of caused an issue, which was a relief to me that didn't contribute to his death. This happened on Monday and he died Thursday morning. We found out he had elevated white blood cells and low red blood cells in May 21 The vet was very surprised he died, could this have been from a lymphoma or a bone marrow cancer?

2 Answers

Most Helpful Answer

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Answered By Dr. Strydom, DVM

Veterinarian

Published on August 18th, 2021

Hello, I am very sorry to hear about your dog Brewki's passing. Unfortunately, I do not have enough information to give you a good answer. I would have to know what type of white blood cells were elevated and how low the red blood cell count was to be of much help. Without all of the medical records it is extremely hard to give council. If you would like, you can chose to do a private consult with one of our vets. That way you can chat back and forth and if you have copies of the bloodwork you can upload those results. I agree with the previous veterinarian though, the Clavamox and Doxycycline administration together likely had nothing to do with his passing. Those two antibiotics are often given concurrently without incidence. When an animal passes away unexpectedly, the only real chance you have to know what may have caused the death is to have a necropsy (autopsy) done on the body but even with that, often times we don't get a definitive answer. Hope this helps somewhat. Best wishes.

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Other Answers

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    Answered By Lauren Jones VMD

    Veterinarian

    Published on

    I'm so sorry to hear about your loss of Brewki. As Dr. Tana and Dr. Strydom mentioned, I would not be even the slightest bit concerned about accidentally giving doxycycline and Clavamox together. At the worst, he would have experienced an upset stomach, but I can't see how this would have contributed to his death. White blood cells can be elevated due to infection and/or inflammation in the body. Red blood cells are low if there is blood loss (injuries, through the intestines, etc.), the body is not producing enough red blood cells, or the immune system is inappropriately destroying them. While it's impossible to know exactly why Brewki died without a necropsy (an autopsy for animals), lymphoma or cancers of the bone marrow are certainly possibilities. Again, I'm very sorry for your loss.

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