My local Atwoods claims to sex the chicks by hanging them upside down by their feet. If the chick fights and flaps back up it is a rooster, if it hangs limp it is a hen. Several employees said this is how they are trained to sex the chicks. They did a demonstration for me, and there is a definite difference in the reaction of the chicks (gender not proven beforehand.) Anyone else ever tried this and found it accurate?? Just curious.