The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
2
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
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A group of pugs is called a grumble.
10
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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Cats and dogs can hear ultrasound.
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