Its tail isn't wagging, but this dog appears to be "happy". And Miho Nagasawa, at Japan's Azabu University, believes she knows why. The researcher says her studies show that canine pleasure is expressed at least as much in a dog's ears and eyes, as in its tail. "Simply because a dog is wagging its tail it's easy to assume that it is happy. But if we examine the facial expression, for example when an owner appears, a dog's ears will go down and its eyes will open wider than normal."moreless
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