I have 6 - 18 wks hens. 3 RIR and 3 Black Sex Link. The girls have been laying for two weeks now. The past week we have gotten 5 eggs daily. We have long suspected one of the RIR to be a rooster. (No real reason - just a hunch). She is chased away from the group by the others and doesn't squat when pet. She sings a beautiful "trill" and doesn't seem to "cackle" like the others. I'm hoping she is just a late bloomer What are your opinions?