And really, if you're not interested in breeding and hatching eggs, just get rid of all the males. It will make your life a lot easier. I'm not sure why they're going after the one particular female but I would rather get rid of the boys than take the chance that rehoming her would work. Good luck!
He should absolutely not be locked in with the chickens. If he tries to mate with them, he can severely injure or kill a chicken. Their anatomy is not compatible!