Savannah breed of cats. Being quite new it, however, recently developed a wild popularity. It is not surprising, because this hybrid is a beautiful animal. This cross of a domestic cat of various breeds and a wild African cat, serval has a long slim body with long hind legs. Size of a cat usually depends on a generation removed from a serval and sex of a cat, but can vary even in one litter. Cats of the first and second generations are largest and can weight up to 30 pounds.