Why Your Dog's Tongue Might Be Their Most Important Body Part Kinship Why Do Dogs Like Squeaky Toys? Whole Dog Journal Did you know your dog's tongue can reveal how hot they are? @passionatelypets shares four tongue shapes to watch for during warmer weather: Cool & Comfortable: When a dog is relaxed vibrating motion animation of cartoon dog sticking tongue 74928234 Stock Video at Vecteezy Why Your Dog's Tongue Might Be Their Most Important Body Part Kinship Its a trick question, Chattering, when a dogs jaw vibrates and their teeth make a clicking or clacking sound, is a physiological response known as arousal. But heres the key: dog chattering