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Why is my older, unspayed Rottweiler suddenly attacking others?

Updated On September 23rd, 2025

Pet's info: Dog | Rottweiler | Female | unspayed | 6 years and 10 months old | 115 lbs

My 115LB Rottweiler has been really aggressive lately she is 6ys old and not spayed she got our little dog and went after my cats and brother what do I do

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1 Answer

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Answered By Andrea M. Brodie, DVM

Veterinarian

Published on November 23rd, 2018

I strongly recommend that you have your dog examined by a vet since she is considered an old dog and very heavy and therefore could be suffering from painful arthritis which in turn may make her aggressive. If pain is the culprit, then NSAIDs given regularly will help control that pain and the aggression may stop. I would be worried that she will hurt your other pets and ultimately the humans in the house (not just your brother). Best keep her separated from the cats until you take her to the vet.

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