Dig Defence® is a below ground fence system that protects commercial and residential structures against invasive wildlife and keeps pets from digging out of yards. DDAC (Dig Defence® Animal Control) Commercial Grade is an easy-to-install permanent barrier (underground fence) which cost effectively addresses problems that previously required the back-breaking task of burying hardware cloth or repeated trapping. DDAC has many applications including installation around foundations, decks, sheds, electrical substations, zoos, barns, yards and ranches.