Feather sexing?

[carolinasculpture]

Hi! Does wing feathering show sex in a ee/black sex link cross or in straight ee? Moms are hatchery, not sure about dad. He is an ee. Chicks hatched in incubator Tuesday evening to night. 2 from each mom. One has more developed wing feathers than the others.

Yellow, with feathers has ee mom, chipmunk with wing fuzz has bsl mom. Here is dad.

I have another chipmunk colored one from the bsl and a really fuzzy brown one from the ee, as well. The last two have wing development similar to the chipmunk shown.
Anyway, disjointed post, but any ideas on gender this early? I will try to post pics of the other two tomorrow.
Thank you!

Edited to fix spelling....

 

[RhodeRunner]

This is a characteristic that is specifically bred for, it isn't something that can be done with any old chick.

You can try to take guesses at it, as that wouldn't hurt. But, it would be surprising if it works.

Some info on feather sexing http://articles.extension.org/pages/65437/sexing-day-old-chicks-on-small-and-backyard-flocks