Do I have two Roos on my hands?

[Heymac08]

Those in question are the ones on the ends :-/ I’m assuming the chocolate is a hen

 

[Chookchicken]

i assume they are silkies (or maybe a silkie cross) in my opinion the white looks like a pullet, the black looks more like a cockerel. Though it also has some pullet looks towards it. you won’t really now 100% until they start laying or crowing.

 

[Mylied]

How old are they? The black looks like a cockerel. Is there comb development on the white? Can I chickenknap the brown one?