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Why is my sweet chihuahua suddenly attacking and biting another dog?

Updated On September 23rd, 2025

Pet's info: Dog | Chihuahua (Smooth Coat) | Male | neutered | 9 years and 8 months old | 10 lbs

I have 3 chihuahuas that are. Years old. They are all rescues. One of them has food aggression so we feed all of them in their cages so no one is afraid of someone eating someone else’s food. Within the last two weeks, the sweetest one i have has been attachacking the food aggression one. Myself and my husband have both been bitten by both dogs - Is this normal? If not, how can I fix it because I love all these dogs, i am disabled and these dogs have saved my live More than once.

1 Answer

Most Helpful Answer

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Answered By Megan, DVM, CVA

Veterinarian

Published on January 22nd, 2019

I would make sure the dog that has become aggressive isn't having any other issues like pain or discomfort. Also, has anything change in your schedule or house that could have made her feel more insecure or anxious? You could talk to your vet about starting her on an anti-anxiety medicine like fluoxetine as this may help. I would also make sure they aren't becoming aggressive over any treats, bones, toys, etc. I hope this helps and she starts to act like herself soon.

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