I appreciate this discussion. My best K's by far, are from late hatches. Not sure why, they all came from the same mating. I will need to use one of the K's next spring, in addition to a cock that I will over winter. So, it appears that the only issue is the K's behavior and ability to get the job done. Would some hens be more receptive than others? I have observed enough males to know they are very different in how they behave. Will there be any behavior indicators at say 6 months, that one could rely on to predict their behavior at 9-10 months? I may have to keep more than I had planned to in hopes that one will be ready at 9-10 months. Thanks.That BR hen (blue#25) I'm holding over? Any cockerel coming after her when he's only 9 months of age better bring his "A" game or she's gonna whip his behind and hand it back to him. No way I'm penning her with a cockerel until he's got his act together. Just sayin'