Humans become wolf-like? What about [url=https://bloodborne.wiki.fextralife.com/file/Bloodborne/Bloodlicker%20Frontal%20Crop%201.png]bloodlickers[/url]? [url=https://bloodborne.wiki.fextralife.com/file/Bloodborne/Brick_Troll_Header_Full.jpg?v=1500930457526]Brick trolls[/url]? [url=https://vignette.wikia.nocookie.net/bloodborne/images/9/99/Rotted_Corpse_concept_art.jpg/revision/latest?cb=20180728142611]Rotted corpses[/url]? And of course, the already IC relevant church giants and servants? These are all humans corrupted by the scourge of beasts, yet none of them are particularly wolf-like.

Point being, the scourge of beasts can have many and varied ways of manifesting itself; lycantrophy just so happens to be the most common for humans. For animals, all signs point to them defaulting to gigantism by becoming unusually large and bulky.