Hi Matt & Jen
Don't have a huge amount of experience with the "larger" breeds, but my KKs do really well with electrified horse tape. It's not as aesthetically pleasing as other fences, but it's easier for the short-sighted little porkies to see!
I start mine off by training them to it in an enclosed area, with live tape inside it, just for a couple of days. I've found that if you start them in an open area, they often get a shock & run forward through it!
They learn VERY quickly, even if it's only one of them that get a shock or two (clever little piggies). Mine totally respect the tape, even when it's shorted by a fallen tree they've stayed behind it & often won't walk through where the fence-line stood when I want to move them - lots of bribery with chopped apples & bananas required!