"Huh???" Papyrus shouts back, more stunned by that question than a severe injury would make him. What kind of question is that, carnival magic turns people into things for specific places, and has the longer-term changes that last as long as they're there... but the wolf's been around before he ever even heard hell was a real place that the carnival might visit. Those transformations don't just change back and forth all willy-nilly.

"No, he's... He was inside it! The vampires dusted the wolf, and... extracted him from its ribcage?!" Even as he says it, he's less and less sure.

Come to think of it, he really hadn't suspected Sans was in it at all, not until they pulled him out. There'd been no sign of a smaller skeleton in the ribcage. But... That would mean Sans is attacking, and that's just infeasible. Sans, for whom play-fighting is too much effort, and who can't even be turned into a vampire anyway.