The dog's sweat glands are located in various parts of the body. The dog's skin does not sweat, only the footpads sweat, so it is not easy to be found, and the dog's tongue can also play a certain role in heat dissipation. Generally, when the weather is hot, dogs like to lie on the ground, so that their foot pads will contact the ground, which helps to dissipate heat. If it is still hot, the dog will stick out its tongue and dissipate heat through the evaporation of saliva.