is the best person to advise you, but I can tell you from personal experience with a very long
tummy virus (my 2 year old had rotavirus
..it lasts a very long
time) the most important thing to watch for is dehydration. Water does not do the trick. It's best to give her pedialight, apple juice diluted with water, even ginger ale (complelely flat, no bubbles) diluted with water. She needs the salts and sugars to stay properly hydrated. I also found plain chicken broth worked well.