Ahhh thanks Ryan, was just werided out by it, every other time I have called always got picked up first ring. Sorry bout the dog. A long time ago one of our dogs had this issue, when we took him to the vet they discovered he had worms, and dogs sometimes do this as a way of "treating" the issue, like but dragging and licking. Also can be a sign of pica. Or more then likely there is just something thats on the gravel that is tasty and he/she wants to eat it. May grab a jar of tobasco and spray some in the mouth the next time he/she tries to do it again?