Thanks for the advice, all. Sounds like splitting em up is the only option, save for culling him (which, rest assured, if it is done will be done swiftly, along with the ones we're culling in a week or two for food. the idea of letting them fight to the death like shadrach said is downright inhumane and, i really don't mean to be rude, but pretty ridiculous. would just end up with one dead chicken and one exhausted, injured chicken).
I'm not sure if i have enough hens at the moment for a proper 2 flocks. We'll be getting more next year, but at the moment we've got 11.