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 have four toes on their hind feet, and five on their front feet.
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Cats and dogs can hear ultrasound.
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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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Two dogs were among the Titanic survivors.
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