Invisible dog fences are electric security systems that prevent the dog from exiting the predetermined area. Your dog would have to wear a collar that makes a sound whenever your dog is close to the fence. When the dog is about the cross the fence, it will experience a mild shock that will startle it and prevent it from exiting the premises. Let’s take a look at the types and best invisible fences out there. What are the different types? Wireless fence Wireless fences use GPS or radio signals to communicate with the collars and set the perimeter of the fence. You do not have to dig up the ground or place anything permanently to set the fence. It is portable, adjustable, and can be set up within a couple of hours. Wired underground fence These fences require a wire to be installed around a yard. This fence then communicates with the collar; a professional would need to dig up a personalized perimeter around the yard and install the wire. It is not portable but very efficient and customizable. Top electric fences The top three best electric fences out there are: PetSafe® Wireless Pet Containment System™ Kit This system has a range of about ½ an acre and is easy to carry around and set up.