I have 2 white cornish hens and 2 brown hens who have a cornish cockerel. They all live happily with my other hens of various breeds and l have had no fighting at all. The hens dont bully any of the other hens but wont stand to be bullied themselves. The cockerel will kill any other cocks but we dont have that problem. I have read that the game cocks will usually pick 3 - 4 hens and ignore the rest, well mine has not read that book and will service any hen he can catch and he does a good job. The game takes a while to grow to any size if pure bred, l have found. Last year we had some game x cockerels which grew to a good size in 3 months and some hens which also are a good size. The hens though could have been sussex or speckldy we just randomly put eggs under any broody we had. Going to try game cock with white sussex this year, am told they are a good meat bird. These birds are a delight to own and the cockerel hasn't a nasty bone in his body, really good with his girls. I have found them a very easy breed to have. Good luck you will love them.