Hm, never came back to update this. Seems Tinks was probably correct, though we were late in coming to that conclusion. Miss E threw up yellow "stuff" a few more times that day, and did a weird poo not long afterwards, so we went to the ER. Big mistake (should've known...) because they kept us in for four nights. They did some blood tests, four urine tests (two attempts at clean catch, two NEEDLES INTO HER BLADDER), then sent us home basically saying "we're not sure what made her sick but she's fine now" :-/ In the meantime DH and Miss A were home developing the runs and some minor vomiting themselves. So very traumatic all around. Should've listened to you all :cry: