hi greenlands, i agree with some of the others that its up to the individual birds as to when it matures........and i wouldnt worry too much over it. i have a pair which always breeds hens that behave/act like cocks and anyone would swear they were. i wouldnt bother too much over it but ive found that sometimes when pairing up and they are not mature enough its a pain as they are not interested in the hens..........j.m.o.