Very few mammals sweat all over, but is there a benefit/reason why sweat is not used and instead other cooling functions (panting, flapping ears, wallowing) is used instead?
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Most mammals don’t have lots of exposed skin that’s only covered in short hairs. If a dog sweat through its fur, it wouldn’t be that effective at cooling, and now you just have a wet dog. So they sweat and lose heat where they can, namely their tongues, ears, and foot pads.
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