My wife is choosing a dog over son and I.

My wife and I had our son in November. He is now 4.5 months. My wife volunteers at a local shelter and there was a mix about 9 months old that was going to be put down. She has talked about wanting to adopt a dog before and I was very hesitant because of my son. I met the dog and he seemed very friendly during the meet and greet. We brought him home and slowly got him accustomed to the home. We kept him in a different part of the house, so he didn't have much interaction with our son.

My wife slowly starts bringing him in to where he can start being around son and any moment, son made any noise, he would growl and charge at him. I would separate them when that happened and my wife would just brush it off as him wanting to play with son. We couldn't do daycare due to him showing aggression traits. The worst event happened when my son was on his back mat and Benson came in from being let outside and charged straight at son, growling and snarling. I quickly got up and grabbed son and Benson bit me on the arm. My mom came and picked up son and I went to the hospital. My wife refuses to rehome and it's put a huge strain on our marriage. Son and I are staying with my mother.

It's taken a huge toll on my mental health and my son does miss his mother. I do not feel comfortable going home with Benson still living there.