I have a bantam cochin roo (about 3 years old) that I caught mating a young pullet (I think about 16, maybe 18 weeks, but not sure). Is she too young to mate? If so, will he hurt her trying? She may be older than I think. She is still about half the size of my full grown (bantam cochin) hens. I was surprized and I don't want her to get injured by the roo. Over the last couple of weeks, it has been clear that he fancies her. They roost together. He calls her over and makes sure she gets treats when I bring them, etc. But I wasn't prepared ....