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My dog became aggressive and nips after spaying. What's wrong?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Female | spayed | 40 lbs

I got her spayed about a month ago and she has became mean and aggressive even toward roommate's 7 week old puppy. She nipping at me when walking by. I tell her no and she walks way to correct it. She is 9 months old

1 Answer

Most Helpful Answer

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Answered By Daniel Fonza, DVM

Veterinarian

Published on December 7th, 2019

Hi there and thank you for using Petco Pet Education Center, formerly Petcoach to address your concern. Based on the information you provided, it sounds to me like Molly needs to be enrolled in a behavior class to help train her. I am sure that there are many trainers in your area, so I would begin calling them and see what they have available for classes. This is beneficial at this age because Molly is so young so take advantage of her age and train her early. I hope this helps!

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