Help with Gender on these Silkies!

[Kallyroberts]

I have 3 silkies I need help with-- The white one is about 7-months old (according to the person I purchased from) and the 2 black are the same age-- about 2-months old now.

 

[BantamLover21]

Its too young to tell the gender of the black ones. I would guess that the white one is a cockerel, though I would think it would be crowing or laying by now, whatever it is.