I have 8 BCM cockerals that were hatched May 2nd. I knew they were all boys at about 3-4 weeks old except for one who kept it a secret until he was 15 weeks or so. I have always referred to him as the "Androgynous roo". He doesn't have the coloring of the other BCM cockerals. He only has copper hackle feathers but the rest is greenish black like a BA and leg feathering is almost non existent. But he is definitely a boy. He recently moved himself from the BCM flock to the mixed flock while free ranging. Today I walked into the coop and there he stood on the nesting board singing the egg song. A few hens were in the boxes laying. I heard they might do this if frightened but I don't think I scare him. I've just never heard any other roo I've ever had do this.