Fence A Pet Hidden Dog Fence is an authorized provider of Pet Stop® brand electronic dog fence systems. Since 1994, Karl Mueller and Tom Foley have been helping to keep your pets safe at home, installing and servicing underground pet fence systems in eastern Massachusetts. Servicing Pet Stop® as well all other underground or electric fence brands, including; Invisible Fence®, PetSafe®, DogWatch®, DogGuard® and Innotek® as an independent contractor. Ask about our trade in specials on Invisible Fence® brand systems and our Invisible Fence® compatible batteries.