I'm pretty good with my way of sexing...the 1st pic it is hard to tell but looks like you have 2 hens and a roo. If you could get closeups of all three birds faces...from the side that would be great.
That is my guess. I can't tell 100% without being able to hold the chicks side by side. But I got it 100% right on sexing when they were chicks here at the house.
This is the first time ever for me, I sure would like to know also. I have 11 ringnecks on lockdown tonight. Can you tell by the comb or the ring around the eyes or the black mark from the corner of the eye? Or the top of head coloring?
I base it off the pattern around the eye....I guess you could call it the "comb" or where the "comb" will be when the birds mature. Usually hens have a small pattern around the eye...and the roos have a large more defined pattern. Wish I had a good picture of a side by side comparrison...you think after 100 chicks I would have a pic or two.
You tell by looking at the waddle patches on the face, around the eyes--- best and easiest to see from hatch to about 2-3 days old. The roos will have very defined outlines of what will be the tell tale roo facial waddles that will grow as jr matures...