My husband and I bought 12 4 day old chicks from a breeder who is 2 hours away from us. We told her that we did not want any roosters just hens. She said if you lay a baby chick on it's back and they don't stretch out their legs then it is a hen. So she did that with 6 RIR and 6 Buffs. This was back in Sept. Now they are almost 5 months old and we are finding out that there is one buff crowing at 6am, and 3 RIR's that have just as big combs and have seen one RIR crow in the afternoon. My question is to those that breed chickens. Has anyone ever heard of this method of determining the sex of chickens? If I buy baby chicks again I just don't want to have the same problem.