Chewed window sill

I haven't had a bit of damage from Karma until this morning and even then I have no idea how it happened. We got up early, went for a walk, she was carrying around one of her rawhides and laying down and chewing it. I remember there was a rawhide on the top of the window sill in the room where I was working and I thought her chewing the rawhide was kinda loud, but it wasn't until later that I looked down there after she had left the room for a while and I got out of my chair and I found that she had chewed up the corner of the window sill. It isn't where her rawhide was sitting, so I don't know how it came to pass. Oh well, another little repair to add to the other dog chewed window sills that will soon be repaired.