Another euphemism for drunkiness. What's worse than being dizzy as a goose? Riding a dizzy goose through the French countryside with a gaggle of your friends (some of whom did not get the memo and are, in fact, riding ducks) wearing little cotton frocks or nothing at all. It's enough to make you turn to drink.
Not as cool as the All-Devil Nativity Scene I saw in Tijuana a few years ago, but not bad. You can buy the dogs in the manger here (and some cats, too). It's not much of a stretch to imagine the caganers for these sets.