Quick question about sexing

[pbjmaker]

We have decided to take about half the "black melanistic" (crosses) to auction tomorrow and I want to get a good mix of sexes if possible. Is there anyway to sex them at 6 1/2 weeks? Some look like they have a little bit of red coming in around their eyes. I am assuming those are probably the boys?

 

[pbjmaker]

OK - we took three that had some red around their faces to the auction. They were ones I was really sure were roosters. The red has really come in on the rest of them this week. Out of nine that hatched 8 of them have the red faces and there is only one lonely girl

Those ain't 50/50 odds