The 777 Bison Ranch has been in the Hillenbrand family for over 40 years and has been raising bison for over 30 years. It is located in southwestern South Dakota, where the landscape is comprised of mixed, short grass prairie.
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With the advent of nuclear microsatellite DNA testing, the number of herds that are known to contain cattle genes has increased. Though approximately 500,000 bison exist on private ranches and in public herds, perhaps only 15,000 to 25,000 of these bison are pure and are not actually bison-cattle hybrids.