BISMARCK, ND (KXNET) – Last year, Prairie Knights Casino held one of the largest bison auctions in the country. And today, Bar 33 Bison Ranch is looking to top their personal record. This was the ninth time Bar 33 got to put on its annual bison sale. Like last year, this year's sale also happened at Prairie Knights Casino. The Fischer family, who owns the ranch, say this sale offers one of the largest selections of animals to buy from. This includes calves, yearlings, cows, and bulls. The Fischers says open consignments are available, but you'll have to call them directly to make arrangements.