reporter: robbie magnan knows what it's like to wait for the lab results.ector of fort peck's fish and wildlife department shows us the reserve's pride and joy -- two herds of bison. the commercial herd brings in money, through hunting licenses. the other is a cultural herd only tribal members are permitted to hunt. each herd has 10 square kilometers of land, bordered by a fence that can withstand the bisons' brute force. though magnan calls these creatures buffalo, claiming only politicians or scientists say bison. robbie: when the creator put us on here, we were dumb. we didn't know how to survive as humans. so, he had the buffalo come up to take care of us. and they helped us survive. reporter: many native americans see bison as four-legged family members, who are vital to their identity. but from the cattle industry's point of view, they're bad for business. robbie: they really fear that buffalo will take the grazing, which is not really true. because buffalo, what they call all year out for food, they do with one day with cattle. so we're not really in