I have 17 week old birds here, one cockerel and six pullets. The cockerel is apparently ready to do what comes naturally. He (a Wyandotte) tried mounting one of the Ideal 236s today. She was not interested, squawking and trying to get away, but he was hanging on with his beak. Since I happened to be there outside, I shooed him off. This is my first time having chickens. Does he need to be separated? Do I let the pullets fend for themselves? Do I let the cockerel do as he wants?