Are these pullets or cockerels?

[Englewood]

I have 3 chicks that one of my hens hatched out about 4 weeks ago. The first and second are both bantam mixes. The third is a standard EE/banty cochin mix. Does anyone have ideas on gender or is it too early to tell?

 

[BorderBrigade]

First one is looking like a pullet bottom two I am thinking cockerels with how they are reddening at such an early age.