They're going on 5 months now. Noone looks like a cockerel out there. I think I'd be able to tell. The bantam barred rock is laying so she's a she. Sebrights and Mille Fleur cockerel's have a comb, and so would the EE and Ameraucanas, but mine don't. My sweet silkie doesn't have anything going on above her beak either, so I'm pretty sure she's a she, too. We used to have an Ameraucana cockerel (Trevor.) Maybe someone cought onto crowing from him.