I have a 4 year old Pit who is very loving. He has started to jump and pull himself over my 6 foot wood fence in the back yard. I have put tin from the top of the fence to the top 2 X 4 but that does not stop him. He doesn't go anywhere yet, just to the front door. I then open the gate and he goes back in the back yard. I don't want anything to happen to him. What else can I do to keep him in the back yard? I have an electric fence so that he can't dig under it. I live out in the country and need to keep him in the back yard. Any help would be greatly appreciated. Thank you.