HOw To SOMETHING IS EATING THE BARK ON THE FRUIT TREES

I was riding around not he zen machine and passed by the pear trees and noticed this. I about fell off! (not so 'zen', ha). Something has stripped and/or eaten the bark of of two fruit trees. They just so happen to both be the pear trees. All other trees, knock on wood, were ok, so something was appealing about these two in particular. I thought maybe deer, though we've never seen any at the farm yet. And any deer would have eaten off the leaves on the upper part and they look fine. Rabbits? Raccoons? Something else? It almost looks like something from ground level was standing up? I decided I needed a temporary fix to cover the bark a bit and maybe deter whatever it is. So I remembered reading that many animals don't like strong herb smells. I had a basil plant in a pot that had gone to seed and I was going to pull it up anyway. So I did, got out the clippers and...