Petco Text Logo
Petco Pet Logo

How to introduce a new, untrained dog to an aggressive dog pack?

Updated On September 23rd, 2025

Pet's info: Dog | German Shepherd | Male | unneutered | 7 years and 4 months old

I adopted a German Shepherd in 2016,he was left in a garden for years after his owners died.we have 3 other dogs and we have trouble with it.one of the three dogs are aggressive and protective of the other 2,and whenever they meet he jumps on Rexi and attacks him. How can we get them together without fights? Rexi is kind of aggressive,doesn’t attack but protects himself rather. How do we introduce a new dog to the pack? He isn’t trained and doesn’t listen. Walks fine,sees a dog goes crazy

This question includes photos that may contain sensitive content. Click to view.

View more to consider that the photos may include sensitive content.

1 Answer

Most Helpful Answer

Image profile

Answered By Joy Fuhrman, DVM, MBA, CPA

Veterinarian

Published on May 8th, 2018

Here is an article on dealing with dominance aggression in dogs: petcoach.co/article/aggression-due-to-dominance/ There are also some great training resources on www.drsophiayin.com. You may also want to consider consulting with a veterinary behaviorist. You can find one in your area on acvb.org.

Vote icon

1Pet Parents found this answer helpful

image
Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Sponsored