Marion: Are you sure you mean chicken wire? Chicken wire has rather large oval or nearly round openings, openings any enterprising ferret worth its name will find a way to attempt to pass through -- and possibly become trapped, with tragic consequences. Perhaps what you mean is hardware cloth. This has square openings, far smaller than a ferret's head, and therefore quite risk-proof. Good idea, though. Al Wiebe [Posted in FML issue 3028]