What are the possible genders

[Fluffy feather]

These three are 9 week old Silkies bought as straight run the one with the smooth head has a single comb I’m wondering if anyone has a guess about genders

 

[MamaPoult]

I would say the two in back are cockerels and the front one is a pullet. I've only raised once batch of silkies so definitely let more experienced people chime in

 

[HorseGirlAbby]

It’s too early to tell for sure.