The Duck-Dog is Sylvester McMonkey McBean's pet from the book Dr. Seuss's ABC. He appears in David Donald Doo's dream.
Icabod asks if he can do a dainty dance. He tries but fails, and Izzy claims that she is doubtful of it.
Trivia[]
In the Seussville website, the Quacking Quacker-oo is used instead of the Duck Dog.