Thanks guys! Perhaps I need to give a little more background....
I brought them home about two months ago. They came from a hoarder. Their cage was way to small, never allowed out. Roaches everywhere. Overgrown talons and beak... just general abuse and neglect.
I took them to my regular vet (who I also work for) immediately just to get a handle on the beak and talon situation. (our avian vet is two and 1/2 hours away). Within two days I had them at the avian vet. Saphira was dealing with multiple issues. Exam showed she was under weight, had liver malfunctions, metabolic bone doses, a respiratory infection, severe arthritis (she would never be able to open her wings again), and several other issues.
We decided to treat one thing at a time as each issue, taken separately, wasn't to difficult to handle.
At first, Draco was so sweet to her and tried to nurse her back to health. He would bring her food and toys and try to get her to interact with him... Then one day that all changed. Out of the blue he began attacking her. He tried to keep her from the food and he became aggressive towards everyone (even me).
Conversations with my avian vet led me to believe that he was just having the natural reaction that a flock has in the wild to a sick bird. So we made the decision to separate them until she was better... which we thought was going well. She seemed to improve. They were to the point that he could have supervised time with her... they would coo and chat with each other and preen each other when they were allowed to be together... Then two nights ago her breathing became labored and we took yet another trip to the avian vet (6 in 8 weeks) and you all know the rest from there.
I don't want to push another bird on Draco. I'm not even thinking of another mate... but since they are so social, is that something I should consider? Do Macaws have anything to do with each other, other than mating bonds? I suppose this is something I could talk to my vet about, I was just wanting to maybe get some feedback from those who have had experience with this type of situation. (Good or bad)
Thank you all again.