The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
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Meysi is one of the world's smallest dogs, measuring in at just 7cm tall, 12cm long, and weighing a meagre 250 grams (only slightly heavier than a hamster!)
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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 puppy is born blind, deaf, and toothless.
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Two dogs were among the Titanic survivors.
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A group of pugs is called a grumble.
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