Background info: Out of my 13 week old flock I have two cockrels. They are a cross between an RIR Bantam and a Phoenix Gamefowl. I never had problems with the Phoenix, was never aggressive, has never pecked at me, or even bother the Banty and her chicks. Problem: I just went to put the lights out in the main coop and both cockrels were going at each other. I thought they were playing around as they usually do but I noticed blood on one of the combs!!! I picked him up and when I put him back down they went at it again!! I inspected the other cockrel and he had blood on his face too!!! I cannot leave them there to kill each other. I guess that's my question: Will they kill each other?? What I did: I put one of them in the "old" coop. There he can keep company a Production Red that I rescues earlier this month. But what will I do tomorrow?? Should I let them be?? Is this a stage?? Or should I keep them tied??