Marsye, are they both boy's? I had a problem with my guys 5 years ago and it got vicious, the big one took a chunk out of the little ones neck, so it was very serious. I took them to a specialist who figured out that I had their alpha dog thing confused, and I did it. So they were trying to do it and were not having much sucess. Some one has to be a pack leader and it has to be you, so when ever they get into it you have to get them both on the ground and take over as a pack leader. This can only get worse, I saw little signs and ignored them until one tried to kill the other. Now they get a long well and realize I'm the boss, take them to where they sleep and make them stay. By all means I do not hit, smack or even raise my voice, I just look them straight in the eye and do a low growl, to let them know this is the head dog. So far it's been working, just don't let it go to far. We are the ones that usually cause our animals to have issues. God I love them to death, and you have a couple of cuties there. Good Luck