Fox, I am so sorry about your predicament. I have been there twice, so I totally know how you feel.

First, I had Rosco, a sharpei-pit mix. Rosco was the gentlest sweetest dog towards everything and everyone. I picked up a queensland heeler pup off of the side of the road and decided to keep him instead of rehoming him. I named him Ricki. I had Ricki until he was probably 7-9 months old. I totally loved him, but he was so cruel to Rosco. No matter what I did or tried, he intimidated Rosco so bad that Rosco wouldn't eat even separately. When they were together, Ricki "guarded" the toys, the dog houses, the pee spot on the lawn...etc... Ricki's qwest all day long was to attack Rosco if Rosco came near any of that stuff. My heart ached, but I rehomed Ricki to a farm. Once Ricki was in a single dog home with lots of running space, he was a different dog. I honestly believe that Ricki was lashing out because he was unhappy. All though it hurt, I do not regret rehoming Ricki.

Rosco wound up having bum luck. He had a broken leg, Parvo, ear and skin problems all by the time he was two. I don't know what happened, but he became extremely aggressive and uncontrollable towards boys. He was so strong that he would go through all costs to attack a child. It was such a horrible feeling because this dog was so wonderful and gentle to my family and our small pets. He was so mellow. -Even 95% of the time, he would be gentle towards boys. But he was unpredictable. There were about 8 attempted attacks all spaced months apart. The first and the last attack actually caused injury. After behaviorists, extensive TLC, and training, I was in the process of rehoming him. I was being really picky and undecisive about his new home because it'd been like 6 months since Rosco had shown any sign of aggression.

One day, we were getting ready to go somewhere. I had Rosco tied up to a tree with a huge chain and a pinch choke collar on while I was loading up the crate in the truck. Rosco broke the tree, broke through the fence, and took off running. I was calling Rosco and walking towards him. (I didn't want to run and scare him. I knew he was in one of his psycho spells, which I hadn't seen in months.) Right then, the neighbor kid whom Rosco had been nice and played with all of his life came outside. This was one of the only kids that I still allowed Rosco around. (With my supervision, of course.) Rosco stopped in his tracks, ran straight towards the kid and I. I could see that Rosco wasn't himself. Rosco went straight for the kid's neck and knocked the child on the ground. I was able get Rosco off of the child before any permanent physical damage was done. Of course, this child will always be emotionally scared. Rosco was so muscular that it took all of my strength. As soon as I pulled him off, he knew he'd done wrong and was a sweet doggy again. After taking care of the child, I sat in the house with Rosco and bawled. Rosco laid in my lap and licked my face for hours while tears streamed down my face. I can't even tell you how much pain I felt. I was so scared. It is such a horrible feeling to love and trust your dog, and then see this monster come out. I decided that I did not want to rehome Rosco. I was afraid that someone might not take me seriously. Rosco was so wonderful most of the time, that they might trust him to much. I put Rosco to sleep that day. To this day, it hurts so bad. And I am not sure if it was the right decision.

Gosh, I wrote a novel and got totally off track. I'm sorry. Your situation just brought up alot of feeling that I have. Anyways, I feel your pain. I feel that you should do something about it before it gets out of hand. You'll feel horrible if something happens to your other dog. I believe that if he's attacking the other dog, that he obviously isn't happy about something. If some TLC can't fix it, I bet he'll be happy in a single dog family. You just might be lucky enough to rehome him with some folks that'll allow you to keep in touch. I still see Ricki all the time. Good luck in your decision. -Tonya