Bought 6 chicks from a local farmer on Oct 20, 2014. 3 where 3-4 weeks old, the other 3 where 5-6 weeks old. The breed is Blue Orp, Jubilee Orp and Brada mix. 2 of the older chicks have good size combs but the 3rd does not. The same for the younger ones - 2 have combs the 3rd does not. None have attempted to crow., but I would like to know if anyone can tell me if these are roos or pullets. Thank you so much.