If you want any other shape, e.g. an invisible fence that outlines your yard, you need to install an electric dog run based on underground wire. (web-rover.com)
Would like to give more room to roam so would like to go with underground wire fence. (dogfencediy.com)
Property features underground wiring, a separate carriage house with potential for a guest suite upstairs, double car garage & beautifully landscaped grounds. (homelife.ca)