FYI, at nearly three weeks old, the one chick that has shorter (or slower to develop) wing feathers and less of a tail is also developing a much more prominent comb -- is looking like a boy! i will keep an eye on these three as they mature to see if the pattern holds, also will watch the four little ones (4 days old now) to see if there's a similar pattern. hoping to hatch five more on tuesday, if my hatching luck holds!