Dogs have been man's pet for over 14,000 years.
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Dogs can make about 100 different facial expressions.
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Service dogs are trained to know when they are on duty. When their harness is on, they know they are at work. When you take it off they instantly become playful and energetic.
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A group of pugs is called a grumble.
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Nervous dogs wag their tails to the left, and happy dogs to the right (from the dog’s point of view) – and fellow canines pick up on this lop-sided tail language.
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Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
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The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
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