Hi L.,
I was diagnosed with allergies when I was around your daughters age. My mom tells me that I would jump off furniture and act crazy with energy. They took me to dozens of doctors. She finally took me to an allergist after a friend of hers told her it might be allergies.
I was tested and found out that I was allergic to almost everything:
Artificial coloring and flavoring, farm animals, potatoes, strawberries, cats, birds, perfume, make up, plastic, and on...
One of the kids I had in my daycare was allergic to red dye #40. She was extremely hyper active if she had food with the dye in it. (Note: dye is also in other things like make - up) I heard this is a common allergy among young children.
I don't have any book suggestions. I just wanted to let you know what I had experienced.
Good luck.
M.