Hens or Roos? Pekin bantams

[Cheekychook11]

I have 10 3 week old chicks, and I’m curious about gender, it seems like this breed the males feather slower, but I’d line the opinions of people more experienced with the breed, I think 3, 5 and 4 are Roos, as well as possibly 10, (pic doesn’t show it but 10 has the smallest comb out of all the chicks) and the rest are pullets, thoughts?
I have two older chicks about six weeks of the same breed and I’m almost certain of their gender but I’ll put pics in case anyone has different opinion

 

[sourland]

They are young, but to me 3, 4, 5, and the white unnumbered bird look like cockerels.

 

[Cheekychook11]

Yeah I agree with you, thoughts on 10? It acts like a roo and feathered slow, but teeny tiny comb