Silkies are so tough to sex! I have three, and was preparing myself for having to give 2 of them away - I would have bet money they were roos. I was waiting for that first crow and I cannot tell you how surprised I was to find all three finally laying eggs. And one of the girls has a huge walnut comb (and as much as I love her, she's not much in looks department). I wouldn't bet the farm - wait for the crow or the egg!