Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
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Dogs have been man's pet for over 14,000 years.
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The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
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One in three dog owners say they have talked to their pets on the phone.
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Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
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Dogs can make about 100 different facial expressions.
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