Bobby spent his time alternating between Southfork and Ewing Oil, and was Jock's favorite son. This made J.R. enormously determined to impress Jock, but despite his huge success in the oil business, J.R. was never able to overcome Jock's favoritism for Bobby. This led to a major rift between them in childhood that continued as they grew up, especially when Bobby married Pamela Barnes (Victoria Principal, briefly Margaret Michaels), who was a member of the Ewings' rival family. The legendary Barnes-Ewing feud began in the 1930s between Jock and Pam's stepfather Digger (Keenan Wynn, originally David Wayne) after their partnership in the oil business dissolved due to Digger's alcoholism and Jock married Digger's childhood sweetheart. The feud continued with J.R. and Digger's son Cliff (Ken Kercheval).