Q flushes happily, enormously pleased that he's made Severus happy. He pipes up: "No one thinks you want brains; livers maybe, but not brains. Not enough iron.
He turns to Sirius. "If you'll make a list of what you need, I'll see what I can do about getting it." He frowns. "I'm not sure about getting things that will work on non-humans though. That might be a bit more difficult."