How do rats sweat?

Rats can only sweat through the bottoms of their feet. This makes it hard for them to lose heat, and they can easily overheat and die. This is why rats have that weird, naked tail; if they get too hot, blood rushes through their tail where here's no warm fur so it can cool off and come back into their bodies. Rats who are desperately hot can also cool off by drooling. It sounds gross but getting their mouth and throat wet helps cold air reach their skin, and the saliva itself gets cold faster than fur does. A lot of blood vessels are in the throat, and the blood there can cool off before going to other parts of the body.