Writer and rancher Dan O'Brien says he was so desperately in need of change five years ago he'd become physically and mentally sick. He found that change when, almost on a whim, he moved a dozen buffalo calves onto his land. In his new book "Buffalo for the Broken Heart" O'Brien describes how his growing herd heals his spirit and his land. He told Minnesota Public Radio's Euan Kerr as soon as he saw buffalo on his pasture, he knew it was the right thing to do. Writer Dan O'Brien's book is called "Buffalo for the Broken Heart."