House cats descend from African wild cats. Desert creatures well acclimated to high heat environments. In cooler climates the cat’s main priority is staying warm enough rather than cooling down. Which is why my cat is presently curled up with her nose in her tail trying to stay warm with my air conditioner maintaining the house at 75 degrees.

Dogs are descended from wolves. Arctic creatures well acclimated to cold environments. So they spend most of their lives with their mouths wide open and their tongues hanging out.