We have two WCB Polish chicks that are 15 weeks old. We also have 6 EE chicks that are 9 weeks old. Half of these are the same size as the Polish gals - I think they're gals... I don't know enough about where these Polish chicks came from to know this... But, how do I know if they are bantams or not? Does the Polish breed have full size as well as bantam birds? If so, how large do each of them grow? Thanks!!! Note: In regards to their sex... should 15 week old roos crow and have wattles by now..? We don't have either of those things going on. Let me know if I'm too soon to guess.