Why do dogs tongues hang out?

Pet Tongues. Letting It All Hang Out. The tongue is a helpful tool that allows them to clean themselves and their young, scoop up water when they drink, gives them a sense of taste, and for dogs the tongue acts as a thermometer. When they pant, air passes over the tongue which in turn helps to cool a dog's body down. read more

Well, it does state "why do SOME pets' tongue hang out of their mouth" not all pets. And yes, dogs of course stick their tongues out while they pant. This post was not meant to make chihuahuas look bad or be negative to any breed. And I'm talking about dogs who's tongues stick out all the time, not just sometimes - which I stated. read more

Normally dogs will pant and even sit with their tongues hanging out to stay cool, but they do pull the tongue back in to swallow and to moisten the surface. A dog with hanging tongue syndrome is unable to retract their tongue, leading to drying, cracking and even discoloration of the skin of the tongue. read more

Hanging Tongue Syndrome is a condition where a dog’s tongue hangs out of his mouth all the time and the dog is unable to bring her tongue in at will. This could be due to the dog’s breed, a mouth or jaw injury, or deformities of the mouth or teeth, among other things. read more