I know what you're going through with the fighting. Luka and Mandy cannot be together unsupervised and can never play together or eat together. We have found it much easier to keep them seperate than to watch them 24/7 to make sure nothing provokes them. Sometimes we couldn't understand what started a fight. When I got bitten last August trying to break them up we decided it was best to keep them apart. Luckily for us the dogs understand the system. Luka stays with my parents and Mandy stays with me, and when we are all together Mandy is generally blocked off in the living room, or one of them is crated, outside, etc. Since we've been doing it so long it's become a routine for us and the dogs and it's working well, although it's still not ideal and I still worry sometimes ... like in a few weeks we are going to have to use pet sitters while we are out of town for my graduation and we are trying to find a way to take Luka with us so we don't have to worry about the pet sitters forgetting that they can't be together. It's stressful sometimes but I just can't imagine giving one of them up and I am so sorry you have to go through that.