Board Thread:Speculation House/@comment-25045079-20140815193846/@comment-10390252-20140917104032

My other theory is much older and assumes that there is a cycle, possibly linked to the state of the moon, that involves a waxing and waning of the power of the Creatures of Grimm. The closer Remnant gets to maximum dark, the more powerful the Creatures get, growing larger, developing more and thicker exoskeletal armour, getting smarter and possibly also developing other abilities like, say, throwing feathers as projectiles.

If this theory is correct, then Ruby encountered those first Beowolves when they were still in the inter-crisis period, just anthromorphic wolves. A year or so down the line, they're rapidly turning into supernatural monsters. It will also get worse the closer to Full Dark they get.