The way to solve this problem is to use nature against them. Specifically to dig the equivalent of a dry moat, and plant it full of cholla “jumping” cactus. The stuff is downright evil.
Too true. A Cholla belt would work wonders!
Here in our desert, we have a few neighbors who use closely-planted cholla as their fences....they get no doggies, kitties or coyote visitors from those directions.