The animals that are diggers can live in shed, crawl space and deck. When you put up the fence so that it can keep these animals out, remember to use also the chicken wire under fence to ensure that these animals do not dig and pass under such fence. The wire should be buried at least a food deep and it should be extended to have at least 90 degree angle. This is to present an horizontal barrier to the animals that dig horizontally. The size of the chicken wire you want to use will depend on which size of the animals that you wish to exclude. If you want to keep away raccoons, opossums and woodchucks, you should consider 3 inch wire.