At what age can you distinguish the sex of a Silkie?

[earthy_chicks]

Hi Everyone!
So I have a four week-old White Silkie that is showing only a small walnut comb but "she" is not easily handled so I was wondering if she might actually be a roo. I can't seem to find any pictures that show the difference between Silkie pullets and roos. Does anyone know what age on average you can tell with the Silkie breed? Thanks!

 

[Sarah Bella]

I'd like to know the answer to this question too, i have 10 silkie chicks coming on saturday.

I've heard you pretty much have to wait for the roo to crow, i'm hoping i'll be able to tell before that....