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My dog has fever, no appetite, low blood cells, and mouth sores. What's wrong?

Updated on September 23rd, 2025

Pet's info: Dog | Coton de Tulear | Female | unspayed | 1 year and 4 months old

My dog seveloped a sudden fever and a loss of appetite. Her RBCs, WBCs, Hemoglobin are low and i discovered today that she has exudative ulcers in the inside of her mouth. What could her diagnosis be? Thank you

1 Answer

Most Helpful Answer

Laura Johnson VMD

Answered By Laura Johnson VMD

Veterinarian

Published on September 12th, 2018

Hi, thanks for using Petco Pet Education Center, formerly Petcoach! Poor Luana!

I have seen viruses attack the oral mucosa and also hit the bone marrow causing low white and red blood cells. The ulcers could also be from electric chord chewing or licking something caustic. Other possibilities are cancer and immune mediated. If it is a virus her blood values should improve over several days. I would have her hospitalized on IV fluids and IV antibiotics, oral sucralfate for the ulcers and an oral chlorhexidine rinse. She should also be on pain medications. She should have CBC's to check the progression of her white count at least every other day.

I wish you both the best!
Vote Icon1Pet Parents found this answer helpful

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