On a windblown prairie hillside, just south of the Canada-Montana border, a lone white headstone has been erected marking what’s believed to be the grave of a Crow Indian named Magpie.

Very few PBR bulls struck a chord like Cool Whip did. New fans drawn to his groovy name learned that a top bull could be sweet in disposition. Cool Whip was like a 1,700-pound puppy dog – a gentle ...