Any obvious signs of 3 month old silkie genders? HELP!

[Brandon97]

hey its brandon,
i have 7 3 month old silkies in black, partridge, white and buff, and need to know any tell tale signs of gender. ther are 2 distictive groups, both groups differ completely in looks, but the have the same size comb and wattles etc. any help would be amazing, i need to know urgently, thanks in advance.
P.S.i will post pics tommorow!

 

[joe17]

Roosters tend to have crests that are swooped back and have streamers. The hens have globular crests. If they are hatchery they almost all look the same with big combs and barely any crests. May have to wait for them to crow or lay eggs.

 

[Brandon97]

one of them doesnt have a crest, 2 have them have extremely globular crests, but are the biggest silkies, why is this?