Renowned horse trainer known for being a leading figure in natural horsemanship. He was the lead equine consultant on the 1998 film The Horse Whisperer.
He several spent years in foster care as a result of an abusive father.
A documentary about his life, Buck, won the U.S. Documentary Competition Audience Award at the 2011 Sundance Film Festival.
He married a woman named Mary and has three daughters.
He worked with closely with actor and director Robert Redford on The Horse Whisperer.