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Updated on September 23rd, 2025
Pet's info: Dog | Mixed Breed Large (61lb +) | Male | unneutered | 4 years and 6 months old | 90 lbs
I need advice on fixing my 4 year old dog. He and His brother are becoming aggressive towards each other. If I get them fixed will it help with the aggressiveness.
2 Answers

Answered By Dr. Melanie, BVSc MS
Veterinarian
Published on April 9th, 2017
Answered By Makenzie Kurth, DVM
Veterinarian
Published on August 25th, 2018
Thanks for using Petco Pet Education Center, formerly Petcoach! Yes, it is probable that getting them fixed will help. I would say that you may not get the full effect until both are fixed.
I would also note that some residual behavioral aggression may remain. This can usually be improved by some anti-anxiety medication and training.
Best wishes to you and the pups!
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