I know the feeling. One day this summer I went out back to feed and water and seen DOC, the BAMMA cock I got last fall standing on my Bruno (Birchen Marans 3 year old cock). DOC had one claw totally wrapped around Bruno's neck. I am sure I saved Bruno's life. Previously Bruno had schooled DOC in fence fighting the prior month. By baiting him into the fence to scatch up his comb. So I guess this was payback for DOC. And DOC's two boys, Leni and L A R S had to be put into isolation thru this recent cold spell. They too do not play well with others. Another trouble maker here is TuT, he is a BUSTOFF cockerel who had beaten up his dad and them took on Thurston and whopped on him before I discovered he too needs to be in solitary confinement. So, IF I was you see how they react tomorrow. Generally their testing each other. They may decide it is no fun getting all bloodied up for nothing. OR split them up and keep one in a cage while the other is out in the pen. That is a last resort. Sorta like what I just went thru for last 3 days.