I have three rabbits which are bread to have kits tomorrow. I put nest boxes in their pens on Thursday (two days ago) but the moms to be have dug out all of the bedding we put in the boxes. I built the boxes from plywood with hardware cloth bottom, lined the bottom with cardboard and filled the nest with yard litter (grass, leaves, etc. same as we use in the chicken coop/laying boxes). The rabbits have dug out all of the litter and even pulled up the cardboard so that the only thing left is hardware cloth. Dont want the new kits lying on hardware cloth, what should I do?