A group of pugs is called a grumble.
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Dogs have been man's pet for over 14,000 years.
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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 four toes on their hind feet, and five on their front feet.
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Dogs can make about 100 different facial expressions.
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