There's also a story, collected in the first Don Rosa Library from Fantagraphics Books, where Donald tries to outsmart his nephews by showing them whacky looking animals, which turn out to be actual mythological creatures. Going insane from being unable to outsmart the kids, Donald eventually gathers many objects and paints and attempts to create the most bizarre animal using an enraged horse. The end result is a rainbow vomit of an animal with various animal skins and body parts, that is drawn in such detail it is amazing, it must be seen to believed.