The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
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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 dog's naked behind leaves absolutely no bacteria when pressed against carpet.
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Dogs sometimes fake being sick to get attention.
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Dogs have four toes on their hind feet, and five on their front feet.
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One in three dog owners say they have talked to their pets on the phone.
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Dogs can be trained to identify the scent of lung cancer long before symptoms develop.
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