We have an issue with our doe destroying her nest box. She tips it over, removes the reinforcing cardboard, spills it all over her warm box and then noses it out to the wire-bottomed portion of the hutch. With her fist litter we took it as a sign that she wasn't pregnant. WRONG-- two days later we discovered a litter born on the floor of her warm box. We have been waiting until day 28 to place the nest box. Any advice?