Well, she's right in that it's edible. And eating it apparently does relieve the inexplicable hunger pangs. Certainly enough that he can more thoroughly appreciate the situation while it lasts.

"I'm sure I don't have the faintest idea what you're talking about," he says loftily. And he is feeling much better already, though of course he'll still try to milk the situation for all it's worth while he can get away with it.

The critter initially shies away a bit--it's not really used to most people other than Merlin, given Merlin's hermit-y habits--but curiosity and/or hunger soon gets the better of it. Which is to say, it steps forward cautiously, then abrutly grabs the morsel from her hand before scurrying a short distance away to devour it.