I have 5 8-wk old white crested black polish. I can't, for the life of me, tell which are cockerels and which are pullets. With the rest of the chicks, it's not been a problem because I can tell by their combs. Of course I can't see combs on the Polish. I've looked for other clues like the cockerels being taller, cockerels being more assertive, cockerels having longer, more upright tail feathers. However, I still can't tell. Anyone have any other way I can tell? Thanks!