I have 5 call ducks, 4girls(I think) and one boy(I think) and I saw the a girl on top of the boy breeding him and then a week later saw a different girl on top of him, both of them have sex-linked colors(gray and dusky gray) and the boy is white, I'm not sure if it is a boy. Is this in retaliation? I've never seen the boy breed the girls. Is this normal