She goes back to the spellbooks and starts looking for one that might bring her, say, a deer. She identifies a little too much with the flock of swans...
Well, that's grotesque, but she's getting the impression that that's the general theme, here; she notes it and keeps looking through the books. (It's not like she's starving yet.)
Another animal summoning spell requires her to urinate in her best approximation of a perfect circle wherever she wants the animal to appear. A third requires that she have the severed foot of the desired kind of animal, whereupon once the proper rituals are complete she can summon as many of it as she likes.
Where is Nona?
At the end of a trail of blood and the occasional stray bit of flesh that leads from the Baron's rooms to the lakeshore, where a pile of blankets and Baron-bits is burning.
"It can do a whole lot of things, though. It won't be hard to re-cast the food spell, just icky."
"It needs a bowl of animal blood. I don't want to kill one of the swans and I don't think I could catch anything else, and the least revolting animal-summoning spell requires the caster to eat a blade of grass soaked in their own blood. There's a lot of blood involved."
"I found some healing spells but nothing general, not in the books. Some of the specific ones will work on things of narrow parameters - like the type of implement. If you have something made of steel to use to get the blood you can be patched up after. All-purpose versions, like what you had before, I'd have to go into his notes for."
"Probably made of steel," nods Etty. "So we can operate out of here till - we know where else we'd go. I can't remember the way to Astgabels..."
"I'm sure someone does, but I don't even know how far away or in what direction the nearest settlement is. If I could still fly..." She nibbles her lip; she wishes she could still fly.
And then she tries wanting to be a human again.
"...Interesting," she says. "Okay, so I can range pretty far afield, looking for places we might go."