Duck family (Disney) strip, Della writes to Donald that the boys had placed a firecracker under their father's chair as a prank and that their father had been sent to the hospital. This was the reason why the boys first showed up at Donald's house. Thereafter the father is generally assumed to have disappeared. In "The Richest Duck in the World", when Scrooge mentions that the few family members he had had disappeared, the boys respond "We know how "that" feels!" Donald's cousin Fethry Duck was created for the Disney Studio Program by Dick Kinney and Al Hubbard and was first used in
Donald Duck U.S. Army during World War II that culminated with him serving as a commando in the film "Commando Duck", and he was frequently away serving in the U.S. Navy in the television cartoon series "DuckTales". Throughout his career, Donald has shown that he's jealous of Mickey and wants his job as Disney's greatest star, similar to the Bugs Bunny and Daffy Duck rivalry. In most Disney theatrical cartoons, Mickey and Donald are shown as friends and have little to no rivalry (exceptions being "The Band Concert," "Magician Mickey" and near the end of "Symphony Hour, "which were due to Donald's