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 Why Do Dogs Stick Their Tongue Out? Potty Buddy Why Do Dogs Stick Their Tongue Out? Top Dog Tips Your dogs tongue could be warning you are you paying attention? , Expert Halo Dog Trainer Charlie Chun breaks down the early signs of heatstroke in dogs just by reading their tongue. , From