That one I'm not absolutely sure on, but I believe that you will get all brown.This kind of confused me lol. I dont understand genteics at all and I suck at science, it was my worst subject next to math. I know the outcomes for breeding blue black and splash. But I guess I should of been more clear on what I was asking with the leghorns, but thank you for explaining the rose comb thing because I had no idea. If you breed brown to brown do you get 100% brown or will you get 50% white or something like that? Thank you