The final verdict is in. 10 of 12 were indeed Roos. The fighting got out of hand so we shipped five off last week to friends. Tomorrow we probably will reduce by 4 or 5 more. Next quest is to get some more hens to add to the ones we have. 10 for 12 doesn't seem like normal odds?
Buckeye chickens. Roos or hens. Is it as easy as looking at comb? Do hens have the green tail feathers at 8 or so weeks of age? We may have picked nearly all roos.