Good luck fencing in that pig. The ones who have been contained since they were piglets are hard enough to keep in. Oscar has been roaming free his whole life, and he'll dig, root, chew, push, and lift anything he can trying to get out.
I saw a cartoon once of a pig in full welding gear with an O/A torch cutting the fence. The farmer was in the foreground with a thought bubble saying, "So that's how he's getting out." It was funny when I first saw it, but it made so much more sense after I raised pigs for a few years.