“Dogs sweat by panting.”

It's a common sight on a warm day: a dog with its tongue (Review) lolling out, breathing rapidly. This familiar image often leads to the belief that dogs sweat through their mouths, much like we sweat through our skin. This misconception likely arises from the visible effort dogs make to cool down, coupled with the lack of visible sweat on their fur, making panting appear to be their primary, full-body sweating mechanism.

While dogs do possess sweat glands, these are primarily found in their paw pads and are not their main method of thermoregulation. Instead, the rapid breathing we observe, known as panting, is a dog's most efficient and crucial cooling strategy. Panting allows moisture to evaporate from the tongue, mouth, and respiratory tract, which effectively carries heat away from the body. Additionally, dogs utilize vasodilation, where blood vessels in their face and ears expand to release excess heat into the environment.

The persistence of this myth is understandable. Humans sweat profusely all over their bodies when hot, and we naturally project our own physiological responses onto other animals. Since we don't see dogs covered in sweat like ourselves, and we do see them panting intensely, it's an easy, albeit incorrect, leap to conclude that their panting serves the exact same function as our sweating. Understanding these distinct cooling methods helps us better care for our canine companions, especially during warmer weather.