As long as they're not fighting with blood, I would keep them together. Macy is just keeping her distance right? I wouldn't be too worried, then.

Although it is a little pitiful when the newcomer wants to play and the current dog doesn't want to, it's actually very common. In fact, when my Grey entered our household, she immediately tried to initiate play with my Peke. My Peke wanted nothing to do with her. He's also food aggressive, so the two dogs had a few hissy fights during the first month. It got to the point where Giselle was *terrified* of Lucky and I was seriously considering giving her back. It broke my heart because Giselle would run away from my Peke and she was just plain 'ol scared of him. For one whole week, she could not stand to be in the same room with my Peke. Believe me, I called my adoption coordinator and asked her what to do, and the thought of giving my Grey back was always in the back of my mind. Then, I posted in need of help and I found that many many people had gone through my same experience and that it almost always got better. Give it a few months. I've had two dogs for about seven months, now, and they're still adjusting to each other. Though they don't love each other, I do see them sleeping close to each other from time to time. Meanwhile, make sure they're having fun fun fun every time they're within each other's presence. Good Luck!