Hidden Dog Fence Supply & Installations For Central Coast & Hunter Regions Of Australia Hidden Fence Central Coast & Hunter offers the DogWatch Hidden Fence brand dog Containment Systems, either fully installed or in DIY kit form. Only Hidden Fence uses a Patented “Safelink FM/DM digital signal” that’s transmitted through a tough polyethylene coated copper boundary wire installed around your property, below ground level or on a fence line. A lightweight, waterproof dog fence receiver collar is worn by your pet and picks up this harmless radio signal. When your pet gets close to the desired boundary (usually within 300mm – 2m of the wire), an audible warning tone reminds your pet not to cross the boundary. If the warning is ignored, which is rare after training, the collar emits a customised stimulation (electrical stimulation or ES ) and prevents your pet from crossing. After the hidden dog fence is installed, the dog is then introduced to the dog fencing system.