I have two 4month olds that insist on sleeping in the nest boxes. This really annoys me because they poop in there too and that's not fair to the hens that need to lay. I have tried going out and putting them from the box on a roost and also blocking up all the nest boxes before nightfall. Shouldn't they want to sit up on a roost by now? They are Blue Jersey Giants, one boy, one girl. Thank you.