The sweat glands that regulate body temperature in dogs are mainly located in the pads of the feet and noses of the limbs, unlike the sweat glands found throughout the body in humans. Unlike humans, who can sweat to dissipate heat, dogs can only sweat and dissipate heat through a small number of tissues, including the pads of the feet and the nose. The sweat that comes out is a drop in the bucket for a dog in need of cooling, so it is common to see dogs open their mouths to breathe, which is also a sign of cooling.
