So I have this 8 month old puppy, I have a car port in my yard that I didn't want him to get to so I installed a 4 foot high chain link fence around the perimeter of the car port. The dog now climbs over the fence to get access to the car port, I have been trying for over 2 months now to train him not to go over but he only does it when he know everybody has left the house. I am almost at the point of getting rid of him as he is very sneaky and stubborn. Any tips or tricks ?