Oreo leading the pack!
Many years ago, when we came home, Oreo greeted us with what we thought was a growl-like-look on his face. His teeth were showing, his lips back... but there was no growling, only a wagging tail and a happy dog! From then on - we were often greeted with the same look, which we decided was his "smile". A number of the kids friends experienced this too! Oreo - the smiling dog!! I have never seen another dog do this.