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 universe with varying degrees of consistency. Disney comics are the primary medium for Donald Duck stories. Contributors include Americans Carl Barks, Ted Osborne, Don Rosa, Tony Strobl, Al Taliaferro, and William Van Horn, as well as Italians Giovan Battista Carpi, Marco Rota, and Romano Scarpa. Other media includes short films in the "Donald Duck" series, children's books such as Little Big Books and Little Golden Books, television series such as "DuckTales" (1987–1990), "Darkwing Duck" (1991–1992), and the "Ducktales" reboot (2017–), and video games such as "QuackShot" (1991), "" (2000), and "" (2013). "Donald Duck universe" is not an official Disney term,