Dogs have four toes on their hind feet, and five on their front feet.
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The Basenji dog is the only dog that is not able to bark.
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Dogs can make about 100 different facial expressions.
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Dogs have been man's pet for over 14,000 years.
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George was the world's largest dog who weighed 233 pounds, stood at 43 inches tall from paw to shoulder, and ate 180 pounds of food a month.
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