not so fluffly chicks

The chicks are 7 going on 8 weeks old now and are losing their fluff. I still believe that we have a hen and a cock of each variety as the crown is quite pronounced on one of each pair. This is not a fail safe method of sexing hens and we will still not know for definate until they are 16 to 20 weeks old. By this time if the days are still long enough the hens will start laying and the cocks will start crowing and showing other behavoural characteristics. We only have 1 Ancana and i think it may be a hen.