Silkies are in my opinion the hardest breed to sex, I've tried feather sexing, and haven't been successful. I've learnt a few different characteristics which are more pronounced comb and lobes for a Rooster they also tend to be slightly bigger. Hens can appear a little rounder in shape. The buff is in my opinion a rooster and the other two are hens. This is strictly my opinion as I said they are hard to sex until they either crow or lay an egg.