Understanding Your Dog's Quivering Tongue Facts About Dogs Tongue You Did Not Know MyFurries Blog Why Does My Dog's Tongue Stick Out? I Love My Chi Does your dog stick out his tongue after barking? 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, Barnes Veterinary Neurology