I found this under the "Romance" tag.

Violently Irrelevant did not write the fic. He simply picked it out of a hat and by his own stupid rules, read it anyway.
Enjoy!
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http://www.fimfiction.net/story/236518/fluttershy-gets-gangbanged-by-timberwolves
Original description:

After stumbling deep into the Everfree Forest alone, Fluttershy is gangbanged by a pack of timberwolves.

Trigger warnings: Bestiality & Rape