Even though walls will keep out some wildlife, you will still get , snakes, bobcats. We have wall/fence backs up to prairie, and have turtles, snakes, bobcats, and coyotes. This morning our cameras went off and one of the bear cubs decided to run through our back yard, taking a moment to leave small pile of scat.
You have larger dogs, but if I cared for my pets I would never leave them alone outside. But that’s just one opinion
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