Hens or cockerels?

[Asho7]

4 week old Wyandottes. Any guesses on sexes?

 

[SilverBirds]

Looks like you have a pair. Less feathered appears to be a cockerel and the darker head a pullet.

 

[AinaWGSD]

Agreed, the one with the lighter colored head is most likely a cockerel. Wyandottes tend to pink up a bit earlier than many other breeds, but that is way too much color for a 4 week old pullet. Nothing about the other one says cockerel, though at this age that could always change.