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There are many different kinds of rats. First there is the Rattus rattus, most commonly known as the black rat, and the Rattus norvegicus, known as the brown rat. There are also fancy rats, which are kept as pets. The most common are Berkinshire rats, which often have an agouti or brown coat, Hooded rats, which are white with a darker colour on the head and back, or Sprague Dawley rats, which are white laboratory rats. There are also hairless rats. This is generally caused by a mutation which is then bred into a population. Hairless rats are often more prone to health problems.

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16y ago

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