Most cat owners are well aware of the dangers that potentially face their pet in the great outdoors, from traffic to predatory animals. But when your cat is purring to be let out to explore the world around him, it’s not easy to resist opening the door to let him roam! The right answer might be an outdoor containment system. There are many to choose from, but the most effective answer for you may be an underground fence. Many cat owners are surprised to learn that the same electronic receivers dogs wear to keep them within a hidden fence can also be used just as effectively on cats!