Pretty much my only requirements for a roo is that he is not aggressive to people (I have small children) and nice to the hens (not being too rough when mating or overmating) I got a cockerel from a friend and he has been the best boy. Respectful to me and the kids, gentle to the hens, and calls the hens over when he has treats for them. He has made the flock very enjoyable to be around and not diminished it in any way.