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There are blue rabbit
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American blue rabbit has such a deep color that it can be called "blue rabbit". This breed was officially recognized in 1918, the year.
Blue Bunny brought a well-known breeder Lewis Salisbury. He picked up the genes of other species of blue rabbits, now extinct, and mix them in such a proportion that has received the most vivid and rich color of the coat. Which breeds were mixed Salisbury unknown, as he took away the secret to the grave.
via factroom.ru