Hard to say. She'd volunteered at a cat shelter for years, no problems. She grew up with cats, no problem. We had been fostering rats for a few years, no problems. Then we got this one male rat who was just filthy and covered in "buck grease" (a problem some male rats have) and who had "personality issues" after having been mistreated. I had been working with him for several months and had gotten him cleaned up and pretty much socialized. He used to be allowed to run around on my bed (I had a king sized bed, and would put a shower curtain down on it and then a big old quilt on top of that) and she had been laying down on the same quilt playing with him, sat up with him in her arms, and then it hit her pretty hard all at once.
Their feed was lab blocks, so I'm not sure precisely what was in it - a lot of alfalfa, anyway. She handles nuts, and eats them all the time, without any problems. (Fingers are crossed that remains the case, as it helps with the low-carb diet she pretty much follows.) Thor's food is also processed kibble, supplemented with sunflower seeds, pumpkin seeds, and alfalfa treats. With the occasional fresh leaf of cilantro or basil (she doesn't like mint). Thor is a "no touchy" hamster, so the Daughter hasn't been handling her, but Thor does live in a very large cage in the living room. I clean it out ever week, so the Daughter isn't in close contact with the hamster poo or anything. Jeez, I really hope she hasn't gotten allergic to Thor. It'd break the Daughter's heart to have to rehome her. (I'd be pretty sad, too. But if it's necessary, it'll happen.)
I hope the doc will be of some use. They certainly got her in fast - like an hour and a half from the phone call!