Skunks dig to feed on insects, particularly on grubs. Skunks will dig up lawns and gardens searching for the insect larvae. They leave cone-shaped, divet-like holes, three to four inches in diameter and may also turn over larger pieces of sod. Removing their food supply usually causes them to go elsewhere. This includes applying grub controls (Merit) and removing other possible food sources that initially attract the skunks to your property.