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Why is my unspayed dog sick after heat with dark gums and panting?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Female | unspayed | 12 years and 9 months old

Hello, my dog has recently finished her cycle and ever since she has not been well. She has lost her appitite which has made her loose weight which has lasted around a week. She now is panting excessively and crying whilst licking her backside. She is not herself and is quite warm, she hasn’t had as much energy as usual. She is 13 years old and has been a healthy and happy dog until now. Her appitite has increased however she has dark gums and has runs and has been sick

1 Answer

Most Helpful Answer

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Answered By Andrea M. Brodie, DVM

Veterinarian

Published on July 10th, 2018

You are describing signs of a uterine infection. This is an emergency and Tara must be seen by a vet ASAP, as this kind of infection can cause sepsis and death. Please have her examined by a vet tomorrow at the latest. The vet will give her a thorough clinical exam, may want to do an xray to visualize the uterus and some blood tests. If she indeed is suffering from a pyometra (uterine infection) she may need surgery to remove her uterus, or, in ome case giving her a specific medication called alizine can cause the uterus to expel the pus. Your vet will advise and consult with you according to the clinical findings.

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