The Revival Meats blog has a post about pig fencing.
It has a nice picture of their pigs, in a totally different landscape than what I'm used to seeing. Where they are now, there's no snow or ice on the ground. There's no black ice or sub zero temperatures. Those are probably some comfortable pigs.
It is amazing to think that pigs formerly owned by Wooly Pigs are now in Texas. The map shows farms where you might encounter our pigs:
Texas, Florida and Louisiana are the outer limits. It will be interesting to see how the pigs do once it gets hot and humid. The ones in Florida survived, so I figure the Louisiana and Texas pigs will too.