My daughter is wanting bantams (it will be approximately 15 which is the minimum order) most likely silkies coachin and buff orphington. I have two leghorns two (big) OE's and two EE plus a welsummer rooster. My question is I know some of you successfully have bantams and full sized living together but will my welsummer rooster hurt the little hens? Will he mate with them? I know we'll end up with several roosters since bantams come straight run I will have to re home some but I would like a little rooster for the little hens will by big rooster Jill him? Will he kill the little girls if he mates them?