I just wanted to let you know that I have had invisible fencing for my German Shepard since she was a puppy. It was the best investment for her I ever made. There is a co. called Invisible Fencing, whom I went through. It can be a little costly, but then again I fenced in my whole yard. You can fence in small areas, but I didn't. I am not sure where you are located, but they provide a great service, including training for the dog. Good luck!!!