Is there any method of sexing (or at least making an educated guess about gender) on two week old Speckled Sussex chicks, such as incoming wing feather color perhaps? Would a cockerel chick have more white on the lower wing feather than a pullet chick (both do have white, of course)? Or perhaps a more upright stance? I realize no method would be foolpoof accurate, but a few tips would be helpful for at least hedging my bets. Thanks!