Bentley does this strange thing which looks like he is chattering his teeth. It seems to happen mostly when he is upset, he has done it a few times when I have taken something away from him and told him off. He also did it when we went away and left him with my son, so it seems to be when he is agitated. Does anyone else's Yorkie do this, I have never seen a dog do this before. His lower lip starts to quiver, looks very strange, lol....
