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Is spaying an older Mastiff with a uterus infection risky?

Updated On September 23rd, 2025

Pet's info: Dog | English Mastiff | Female | unspayed | 6 years and 9 months old | 130 lbs

Hi, I have a 7 yr old English Mastiff that has a uterus infection. We cleared it up about a month and a half ago with antibiotics but it had came back within a week after finishing the antibiotics. My vet and I feel the only option is a spay surgery. Just wondering how high the risk is going to be with her age and weight? I saved her and a sister and brother from a bad upbringing and am worried sick um gonna loose her. Any reply is greatly appreciated. Thank you, Jamie M

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1 Answer

Most Helpful Answer

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Answered By Andrea M. Brodie, DVM

Veterinarian

Published on April 16th, 2018

Unfortunately the choice is either removal of the uterus and ovaries and survival or losing her to sepsis or kidney failure . Anesthesia is very safe nowadays and the surgery, while log and not easy, is not that dangerous. So having her spayed is the best and safest option, even at her age. Your vet will likely do gas anesthesia which is very easily turned off, ie , if there are complications, your dog can be taken our of anesthesia very quickly, which is a safety factor. Ask your vet for pain medicine for her for the days afterwards.

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