I have 6 chicks 8 weeks old. Two orpingtons, two sussex/ orpington crosses, two silkies. I was wondering at about what age the orpingtons start crowing, I seem to remember they were later than my polish and the tiny little rosecomb that started at 5 weeks! I am trying to figure out if I have a bunch of hens or roos! The large breeds all look much the same with comb size and wattles. The two silkies look like I might have a hen and a roo. Will have to wait and see with those two... any tips? I was looking at the hackle feathers and they look like they are all the rounded feathers of a pullet, how soon do the feathers show the difference? I have a friend who wants 3 hens and a roo and I was wondering how soon I will know? I also want to split them up so I can give feed specific for the sex, broiler vs layer prep...