It's not just Disney. In the original illustrations for The Lion, The Witch, and the Wardrobe for Mr. Beaver's house, there's two different ham's curing on the wall. Actually, here's the url: https://www.pinterest.com/pin/395824254728691463/
Well, it could make sense since many ducks are assholes. And commit more necrophilia than a crematory employee and also ducks rape until the other dies sometimes kinda like dolphins. And ducks don't care if it is their children and or even young ducklings.
