I put circular fences around practically everything in my yard and orchard, like Farwell does. Mine are only about 4' high.
Liquid Fence is a spray-on product that works pretty well. Many master gardener friends use it.
I also bought a 410 shot gun. Did in 7 of the hooved rats last year with slugs and 17 rabbits with bird shot. I did many circuits near dusk and got most of the hooved rats that way. They got to where they were virtually thumbing their noses at me. They'd be eating plums from my plum tree out front (can't protect them once they're fruit bearing size) while I mowed grass behind the house. If I knocked any down too close to the house, those got drug down below for the buzzards. Hitched them behind the tractor or scooped them up in the FEL, depending on where they lay. Use the 3" slug loads. Haven't had much luck lately with the 2 1/2" slug loads or have lost my knack in being able to hit them (no rear sights on a 410).
I've a kill permit. Can get it from any game warden. You can kill anything anytime without antlers. Almost never see any with antlers. Kept seeing 3, 2 females and a faun. They'd alude me on foot, but I knocked down the 2 females from my tractors and got the faun down near my garden the next day. They just stop and look at the tractor. Good bait.
Ralph