Aww, they are cute. I just hatched some. The dark may be in a lot of the wings..don't think that is a way to sex them. I can see a couple of girls in there if I go by wing tipping. The long skinny wings, are usually girls. The one up front facing the other way looks like a girl. The one right next to her looks like a boy. Just a wing tipping guess.

. Show quality hatching eggs are of interest too. I can only have one or two of a breed so having the chance to hatch show quality is enticing too!!! I don't show chickens but I want eye candy chicken roaming my urban backyard.
I will figure out this bator if it's the last thing I do!