[Lou] sent in this amazingly simple hack that has been saving him money on special batteries for his dog collar. He uses an invisible fence system which gives the dog a shock if it passes beyond ...

Unlike the previous invisible fence, the wireless dog fence system ... The signal works as long as the collar's battery is charged. Once the collar loses its charge, you'll need to recharge ...

The best wireless dog fences help keep your pups safe outdoors. We tapped a professional trainer to choose our top 4 picks.