I thought I'd follow up. I picked the hogs up. They were considerably bigger and so I brought them home in a large dog kennel. They were a bit more athletic than I recall of domestic pigs. Rooting under the pen wasn't the problem, they leapt the 3' hog-panel pen that I had built them and did so with almost no effort at all. They then began to chase my dog so I let her in the house. I had to shoot them while they cowered in the corner of the yard.
Tasty meat. I'm satisfied.
Tasty meat. I'm satisfied.