On the National Bison Range in Moise, Mt, some remnants of Yellowstone Park bison were transplanted to save the species.  After establishment, each year they needed to be rounded up for health checks.  Local cowboys were hired to do the roundup with their best cattle herding horses.  The rodeo began.  The horses were soon exhausted trying to keep up with an animal refusing to be herded.  One old timer said that Bison would run until blood was running from their nose, but they were just getting started.  After loss of some expensive horses, exhausted horses and broken, exhausted cowboys, the roundups transpired from the failed cattle-style herding to a gentler approach to guide rather than herd.  The subsequent herds are somewhat less wild as they experience the annual roundup.  Cowboys don't use their most expensive cutting horses anymore.  A magnificent creature.