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Why is my 3-year-old dog suddenly aggressive towards her mom?

Updated On September 23rd, 2025

Pet's info: Dog | Russell Terrier | Female | unspayed | 3 years and 6 months old

hi my dog has turned aggressive to her mum (dog) for no reason mum is nearly 6 daughter the aggressive one is 3 ive had to cage her to stop her attacking this had happened over the last 2 weeks and getting worse

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1 Answer

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Answered By Maria DVM

Veterinarian

Published on March 4th, 2018

Bella is adorable. I would recommend taking Bella to the veterinarian to make sure there is nothing medical going on with her. If that comes back as just behavioral I would recommend getting a trainer to work with you and her. They will be able to see what is the trigger and work with her and you to stop the behavior. If the trainer evaluates her and determines medication is needed then your veterinarian can provide medication to help. Thank you for using Petco Pet Education Center, formerly Petcoach.

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