Thanks, guys.
I seriously thought about Epi, and so did DH. We talked about it, but opted not to as long as things seemed to be getting better.
The diarrhea was non-repeating. Definitely not like illness.
Poor DD got "egged" just a few days later, too. Twice, no less, since I was 'kind' enough to reheat the leftovers for her the next morning... (since she didn't tell me that there was any major problem the night before). I definitely deserve a badmommy award for that stunt. Though to be fair;
she really should know better than to not tell us about vomiting/diarrheal illness. But I
swear that I read the bag. Twice. Turkey Meatballs, Foster Farms, and the label looked clear. But her response (with, um... an N of two) didn't lie. DH and I both have eaten from the same container about four times at this point.