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Why is my dog suddenly aggressive on leash and barking at people?

Updated on September 23rd, 2025

Pet's info: Dog | Staffordshire Bull Terrier | Female | spayed | 3 years and 1 month old | 55 lbs

My dog has become aggressive towards dogs and it’s more when she’s on the lead. She will growl at other dogs and go for them but has never bit another dog. She has also barked at a person which she has never don’t before and this was recently she didn’t bite the lady just aggressive which wasn’t like her, I’m not sure if Chai had sensed something towards the woman. I am just worried that it’s going to get worse.

1 Answer

Most Helpful Answer

Maria DVM

Answered By Maria DVM

Veterinarian

Published on December 14th, 2017

I would recommend having a trainer come to your home and working with Chai. I would have them walk with you and Chai to see exactly what is going on and then work with you and her to help you control/fix the problem.

I don't like the fact that she became aggressive towards the lady and so I would call someone as soon as possible. Your veterinarian should know someone who should e able to help you.

If this is a new behavior I would recommend having your veterinarian do a full evaluation of Chai just to make sure there isn't anything medical going on with her.

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