Sexing 4 week olds?

[inertsoul]

i read you should be able to sex at 4 weeks by their wings. Is that true? If so can anyone help me sex these 4?
Chicken 1

Chick 2

chick 3

chick 4

 

[BudgieKing15]

I'm gonna guess that (according to their combs and wings), 1 is a pullet, 2 is a cockerel, 3 is a pullet, and 4 is a pullet, but I'm not 100% positive.

 

[keesmom]

No, you can't sex a 4 week old chick by the wings. You may be able to tell by the comb. Number 2 looks to be the only likely suspect for now but 4 weeks is still rather young. Post updated pics in another 2-4 weeks.