The largest breed of rabbit is the Flemish Giant.
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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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A 42-foot sperm whale has about 7 tons of oil in it.
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The elephant brain weighs about 6,000g.
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The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
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George was the world's largest dog who weighed 233 pounds, stood at 43 inches tall from paw to shoulder, and ate 180 pounds of food a month.
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Denmark has twice as many pigs as there are people.
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