B182.1.1. Magic dog vomits any liquor required of him (WTF - Weird Things in Folktales)

Welcome to my A to Z Challenge blog series titled WTF - Weird Things in Folktales! Find the introduction post (explaining the theme) here. Find all other participating blogs in the comments of each day's post on the main blog! You can also follow us on Twitter and Facebook.
The B list of the Motif Index is the realm of Animals, both mundane and magical. Some are fairly common ("B11 - Dragon"),