The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
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An average cat has 1-8 kittens per litter and can have 2-3 litters per year. During her productive life, one female cat could have more than 100 kittens. A single pair of cats and their kittens can produce as many as 420,000 kittens in just 7 years.
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Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
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There's a competition in Sweden called Kaninhoppning, or rabbit show jumping.
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Mahatma Gandhi used to travel with his goat so that he could have fresh milk.
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