I looked at this question for a previous thread!

Here's what I wrote, and then a link to the sources:

There are actually quite a few reports of wolves threatening Paris in the late Middle Ages. In the apparently bleak winter of 1438, they were hungry enough to skid into the city on the frozen Seine River and snatch away whatever street animals, including dogs, they could find. (According to an anonymous chronicler, one of these wolves also stole and killed a baby.) The picture evoked is definitely one of desperate scavengers, not the march of the hyenas from that great nature documentary The Lion King.

Perhaps most interesting in the current context is a particularly fearsome wolf who became infamous enough in Paris to earn the nickname Courtaud or "short-tail." Courtaud appeared in the midst of a wave of wolves actually killing humans of all ages in Paris, and "people spoke of him like they would a bandit of the forest"--an outlaw robber of the highways.

• For an English translation, scroll down on this page to "The Menace of the Wolves"

• For the French original, it's the bottom of p. 348 to the top of p. 349--#772