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Why is my 8-year-old spayed dog suddenly aggressive to other animals?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Female | 9 years and 6 months old | 100 lbs

I have a mixed breed with pit and I'm not sure, she have been fixed, and is now eight years old, but have become very aggressive, and mean to other animals, what can I do

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1 Answer

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Answered By Dr. Strydom, DVM

Veterinarian

Published on December 10th, 2019

Many times when dogs get older they get arthritis and they hurt so that is why they get grumpy. I suggest you have her to your vet for an exam. If she has pain somewhere the vet can prescribe medications to make her feel better.

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