There is a clearly ironic tone to her next words. "I guessed." Human mages exist, she knows that much, but she's fairly sure that they wouldn't smell of dog that strongly. Or do strange contracts.

"...How do you look human?" She's very doubtful that she could emulate it, doubtful also that he will tell her, but she can't bring herself to not ask. It's only a tiny little hope, a hope that she almost a hundred percent sure will be crushed, so she should better try to crush it as quickly as possible.