I only have one chicken at the moment and would like some more. I think she's lonely as she sits at the back door all day. If I buy two chickens that have come from the same place, will they get together and bully my current girl? And can you mix breeds? I have a bantam so I'm assuming I need to buy hens of a similar size. And is it OK to not have a rooster? I live in a residential area and it's against council law to have one.