Ok, then what could you put between the ground and the wire, so the charge says flowing through the wire?
What got me started on this was the American Hoggers show. Seems like a whole lot of work and effort for 1 hog.
Seems to me, if you were in the hog clearing business, you'd look for the best way to knock several hogs down at once.
You could use wood or anything non conductive. If you use metal stakes or something you would need isolators like what you'd find on an electric fence. If you're just planning on shocking them to scare them away the small DC generators would do that, (all voltage no amperage). If you were planning on enough of a jolt to actually stun them or knock them out/down then you're going to need some amperage. I don't think there's really a realistic way of doing that out there at the ranch. I give you this advice because I am an electrical inspector & spent years as an electrician, I also hold a second job working for a hog removal business. Everyone has different methods & such when it comes to dogs, etc. We run dogs, traps, snares, spot & stalk with night vision, pretty much every way to kill them except hitting them with my truck....but thinking about building a bumper for that too lol! With the dogs though, it can be alot of work....especially if you don't have good dogs. Luckily we have good dogs & will catch one after another, that's fun but I also enjoy popping them with my rifle using night vision. We actually just got a brand new Crosman 357 caliber high power air rifle with night vision scope in yesterday. Supposed to sound about like a 22 rimfire, can't wait to try it out!