This is especially helpful if your pet has a habit of disappearing into your neighborhood and you want to keep the pet within an allocated boundary.
The underground pet fence has wires placed underground and a collar on your pet. If the pet steps close to the boundary it will hear beeps and if it gets on the boundary it will either get a mild static electric shock or a spray of Citronella, depending on your settings.
Both of these methods are considered humane and will not harm your pet. For confirmation if an underground pet fence is the best solution for your pet, contact your local vet.
To read more Underground Pet Fence To Keep Your Pet Within Your Yard
