Not familiar with bison, but we do have the same issue with deer, as I understand it. We've driven out their natural predators, so they have a habit of overpopu

Not familiar with bison, but we do have the same issue with deer, as I understand it. We've driven out their natural predators, so they have a habit of overpopulating and eating their environment clean, then starving off. That's why we encourage controlled hunting. Keeps the numbers down to what they would have been if we still had wolves/bears around eating them.