I'm not sure if my son has parasites, but I had them when I was 2, and an iridologist told me that I still have parasites. I could have passed them on to him via breastmilk.
I was reading what to do for ADHD and one thing it said was to do a parasite and liver cleanse. Have you done a liver cleanse for your daughter?
My son is constipated and has recently been complaining about back pain between his shoulder blades. I don't know if these are symptoms of anything. Just thought I would mention them, in case your daughter had these symptoms.