Panels are there to keep the pigs out like Kevin said. That pen is a bit small at 16'x16'. Deer like it to be double that size. Plan is to increase its size this spring, add a high protein tub, and have protein pellets. Then throw corn starting around late September. The pigs can climb the fence, but typically don't I have a couple get in there over Christmas, but most don't get in. They get the corn on the outside of the fence and keep moving along.