Hi! Can anyone help me sex my silkie chickens?

[Mrsdawg]

Hi!

I have three pet silkies- a buff, a white, and a splash. All three of them are about 23 weeks old. None of them are crowing or laying eggs yet. I've attached pictures, but I apologize that they are not the best. I hope you can offer some advice. I love all three of them dearly and don't want to give them up. THANK YOU!!!

They r all three hens