Over the years I've approached the problem of roosters differently. And I can honestly say, at this point, that there is no sure way to train them. Some respond, some don't. I've kept a B.O.Q. (Batchelor Officer's Quarters) which actually works, but you need the space to do so. I've kept them, rehomed them, and eaten them, and even gave a few their freedom. Still, if you have a flock of more than 3 or 4 hens, and let them do any kind of free ranging, you need a good rooster. The only answer is, there is no one answer - different circumstances dictate different solutions. I'm fairly certain I have a Roo in my new flock, and while I hope he IS a he, I hope he is a good one, and not a feathered demonic nightmare.