In Hopewell Township, New Jersey, chickens are only allowed to mate on 10 pre-selected days per year. And that isn’t the only law that poultry must follow. They must be disease-free in order to mate. There are to be no more than six hens per half-acre lot. And roosters must keep their crowing in check — violating Hopewell’s strict crowing regulations means a two-year banishment from the property they disturbed.