We want to hatch our own chickens, but we don't want a roo to hurt the hens. If we got one, what breed? For hens, we have: 10 golden comets, 2 white leghorns, 2 brown leghorns, and 1 golden laced winedot. I heard it isn't the best to cross-breed, is that true? Would on roo hurt the hens that much?