Why is Dog Sticking Tongue Out While Sleeping Internet Vibes 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 Is My Dog Panting and Restless? 7 Causes You Shouldn't Ignore Dr. Buzby's ToeGrips for Dogs Why Do Dogs Stick Their Tongue Out? Top Dog Tips What Really Causes Your Dog to Sleep With Its Tongue Out? Your Pets at Home