Nadia titles her head at Terry and then turns back to the professors.

"Mmh, my head is out of order, I can't think of why we would be using rats. I can only guess it has something to do with what the rat is: small and difficult to catch. However we are using the spleen, the interior of it. So I don't know really... I also heard rats principally are used for experimentation, especially to shrink -" *she paused* "No- never mind... No, I'm clueless. Could you tell us professor what's the use of rat spleen in the potion?"