Building a business empire on cheese may not be architecturally sound, but it proved to be a solid foundation for Mark Davis and Davisco Foods International. The $1 billion dairy-processing company, which produces a million pounds of cheese every day, was acquired by Quebec-based Agropur last August. Although Davis has turned operations of the family holdings over to his five “capable and competent” children, his family still owns Cambria, Sun Country Airlines and four dairy farms. Davis notes with a laugh that his career “was too short and I got mature too fast.”