I have 2 drakes. A white inidian runner named Aflac and a crested khaki Campbell named Moe. I had to separate them for a couple of days, and now when they see each other, they grab each other's necks and begin fighting. I can't keep them separate for much longer. Should I let them fight and figure out the pecking order? Or would they kill each other? Understand that I love both of these drakes very much and it'd be very hard for me to give one of them up.