The link you gave I saw a lot of hens. Did yours all turn out to be roos? They looked like it to me...
If I am sounding foolish and you know all this...just ignore me, but yours have saddle feathers and thick legs. They also have roo tails...the difference in the thread you put up shows hens with "abnormally" large combs on some but the body and tails look like a hen.Have your's tried crowing yet?