[Chip's Mom]

We bought a wireless fence several years ago for our mixed breed turned neighborhood dog to keep her in. She got zapped several times and kept going through the fence. We actually had a 4 ft fence and the wireless fence and she would still jump the fence, shake her head and keep on going to the neighbors. After many collars (expensive) and failed attempts to keep her in the yard, we gave up and shut it off. A friend of mine here at work has one for her little dog and there is no problem. The little dog stays in the yard. The only thing you do need to keep in mind is that sometimes the wire that is underground breaks and the connection is lost and your dog will be able to walk right through and of course, other dogs will still be able to come into your yard with this type of fence.