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How does a dog see the world?

By: Russell McLendon on Nov. 10, 2017, 12:15 p.m.
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Other dogs

Since dogs can't see red, scientists used to think they use luster more than color as a visual cue. But a 2013 study disputed that idea, finding color is "more informative than brightness" for a dog comparing two objects that differ in both.

Fur color might therefore help dogs recognize each other from a distance, along with related signals like body size and shape. This chow's reddish coat may seem green to other dogs, but that skewed hue could still help them distinguish the chow from a Swedish Lapphund down the street — at least until they get close enough for a proper sniff-down.