[His efforts to take her mind of what was troubling her seem to have been effective, though his small grimace suggests he hadn't exactly planned the conversation to take this turn.]

I could, in theory, but unfortunately the toxicity doesn't go both ways, and my strength isn't what it would be if I were feeding at my regular levels. What I could do, however, is possibly identify a shapeshifter in human form, at least if they're similar enough to one from my world for me to notice the... Their blood smells rather like meat that's gone rancid, for lack of a better metaphor.