Can any of you tell me if my chicks are male or female?

[katiescoop]

My silver wyandotte



my polish frizzle and buff cochin in the back

a better shot of my cochin, and yu can see the three of them together. all are about 3 weeks old. I also have chicks that are just a few days old, is there any way to know if they are male or female?

 

[juliechick]

They are still too young.

 

[WalkingOnSunshine]

They are still too young.

X2