what sex are these silkie chicks?

[TheLukeMeister]

I only took pics of there combs and one is a single comb silkie (yes he has 5 toes and feathers on his feat, hes a silkie) their all 3 days old (except for the last one who is 2).
heres the single comb. I think hes a roo:

I don't know about this one compared to the others, I'd say hes a roo too:


And my smallest chick the 2 day old:


does anyone know what sex they are based on their combs?

Thanks!

 

[keesmom]

They are far too young to sex.