Some kind of animal is removing (eating?) the bark off of some of the white oak branches on our 40 acres. Generally, the limbs are about 2 inches in diameter and the debarked area on the branch is about 2 feet long. It's only happening on white oaks and on only one branch per tree. The affected branches are anywheres from 8 to 20 feet off of the ground, so it's not a rabbit. Could it be a porkypine? I thought porkypines only ate pine bark?