The invisible dog fence is used for two main applications. The first one is if you have a dog that just loves to escape from your garden or backyard. You know the type of dog we are talking about, they can jump and even climb fences, squeeze through the smallest gap or dig tunnels beneath the fence. Having one of these dogs is extremely frustrating because they are so difficult to contain. dog training school What are your options, you can replace the fence, but with what? It would have to be a very high fence and it would have to go underground as well, and this type of fence does not come on the cheap.