DogWatch Hidden Fences keep your pets safe. The Hidden Fence creates a secure boundary to keep your pets safely in your yard and away from places you don't want them, such as gardens, swimming pools and driveways. With a Hidden Fence, your pets can run, play and exercise so they stay happy and healthy. Hidden Fences are also commonly known as wireless fences, underground fences, invisible fences*, and electric fences for dogs. The revolutionary new SmartFence is designed to keep your pets safe while keeping you informed.