Question: As we all know, werewolves are humans that are transformed into ravenous flesh eating monsters. Some are [sentient](http://en.wikipedia.org/wiki/The_Wolf%27s_Hour), but most appear to be feral hunters of humans. Is there such a thing as reverse Lycanthropy? If so, what is the first story of an animal cyclicly turning into a human similar to the way humans turn into werewolves? I'm looking for the earliest example from the movies, TV, books, comics, or legends.

Answer: 
In the Terry Pratchett Discworld Novel Reaper Man, the character [Lupine](http://wiki.lspace.org/wiki/Lupine) is a wolf who, under the full moon, turns into a wolf-man.
We have an accepted answer which is definitely older, but for future querents, I want to mention Peter David's 1989 novel, *[Howling Mad](http://www.goodreads.com/book/show/175935.Howling_Mad)*, features a wolf bitten by a werewolf who's cursed to turn human under the full moon. It's a romance novel, of sorts.