Why dogs paws are not cold?

Children often ask this excellent question: Do the dogs have cold feet? The answer is no. Like many wild animals living in cold climates, dogs have heat exchangers within their pads. The bloodstream back toward the body is always warm … until the outside temperature is -35 ° C.
Dogs can walk in the snow without any fear. They have anatomical adaptations (counterflow heat exchangers) in the pads that are normally found in animals living in cold climates. © C.-J. Richey121, Flickr, CC by-nc-nd 2.0 Counterflow heat exchangers in the legs

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