World's Smartest Dog? Meet a Border Collie Whose Memory Astounds

For one amazing dog, the words "sit," "fetch," and "roll over" aren't the limits of her language -- they're only the beginning. Six-year-old female border collie Chaser has been trained by her owner to understand more than 1,000 words, along with simple sentences. Chaser's owner, John Pilley, has spent years training and testing the limits of her intelligence. The 82-year-old psychology professor used children's toys and other objects to teach Chaser nouns, and she's still learning new...Full Story
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