We have a 16 month old GS that we have had since he was 7 weeks. A couple of weeks ago, my 12 year old was in the kitchen getting food and she turned around to pet the dog and he bit her. Hard enough that I had to rush her to the hospital. Since then, he frequently starts to go after her if she comes near me in any agressive way. I was in bed last night and he was laying in our bedroom as he always does and she came into the bedroom and he went after her. So I took her in her bedroom to get her settled, came back out. He was laying at my doorway so I started yelling at him pointing my finger at him telling him he did wrong by going after her and he lunged at me and attempted to bite me. Here, I thought I was the one he wouldnt go after cuz he is always protecting me. He has not been fixed. My daughter is adamant that we get rid of him but my husband is having a hard time with it. Im really worried that he is gong to really attack one of us. Any idea why he is being like this?