The Smartest Dog in the World
Anderson Cooper meets Chaser, a dog who can identify over 1,000 toys, and the scientists who are studying the brain of man's best friend.
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The Smartest Dog in the World
CBS News
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Preview: The Smartest Dog in the World
Anderson Cooper meets Chaser, a dog who can identify over a thousand toys, and the scientists who are studying the brain of man's..
CBS News