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
The Oregon Duck logo. Relying on the photo as evidence of Disney's wishes, in 1973, both parties signed a formal agreement granting the university the right to use Donald's likeness as a symbol for (and restricted to) Oregon sports. The agreement gave Disney control over where the mascot could perform and ensured that the performer inside the costume would "properly represent the Donald Duck character." In 2010, Disney and the university reached an agreement that removed the costumed Oregon Duck mascot from its association with the Donald trademark, and allowed The Duck to make more public appearances, such as at college mascot competitions.