If you have fence climbing dogs, here's a solution. Ranchers have used these to keep coyotes from getting to their livestock. I know it as "coyote roll". PVC pipe strung over the top of a fence. Dogs "roll" back into the yard.
Peace in the Yard: 7 Ways To Dog Proof Your Fence. Definitely using the L Footer with our privacy fence. - Tap the pin for the most adorable pawtastic fur baby apparel! You'll love the dog clothes and cat clothes!