Dog Body Language #6 Sometimes dogs flick their tongues or lick their lips at times that are not associated with eating or drinking. It often indicates that they are uncomfortable. Next time Dog Teeth Chattering: Causes and What To Do PetMD Facts About Dogs Tongue You Did Not Know MyFurries Blog Ever seen a dog flick their tongue and vibrate their jaw after sniffing something interesting? This is called the Flehmen response. It's a special technique dogs use to enhance their sense of Why Your Dog's Tongue Might Be Their Most Important Body Part Kinship