They're not wild like elk or deer. Flight and fair chase. Apply the fair chase principle to bison. You can't do it. Elk jump over a fence.
Bison go through a fence.
It's not that the elk is some majestically wonderful animal and bison aren't. But bisons' habits increase the probability of causing disease in cattle. The bison-brucellosis controversy has been ongoing for years and will continue to take time, Siroky says. During recent years and currently, Mack has been working with other agencies and individuals concerned about the bison and the perceived brucellosis threat to livestock. Mack, along with other biologists and resource management specialists in Yellowstone, are cooperatively working to find a solution and to assess risk management, he says.