Day 22: Tongue Flick = Uncomfortable? Barnes Veterinary Neurology Understanding Your Dog's Quivering Tongue Whether they're showing a little extra love or trying to tell you something's up, a dog's tongue can say a lot Understanding these behaviors helps us build a stronger, more Ever seen a dog flick their tongue and vibrate their jaw after sniffing something interesting? This is called the Flehmen response. Its a special technique dogs use to enhance their sense of smell, Understanding A Dog's Body Language Spot and Tango