She needs to be off dairy and soy as well as gluten and anything else that causes inflammation. Her gut is inflammed. She needs to heal her gut. There is a great website out there about healing bone broths. I am not sure if I can post it or not as I got a warning from someone when I mentioned my cookbook, so I am not sure how much info I can give you. I am a nutritionist who helps people with diet, but again I am not looking for clients, I can just give you some helping ideas if you like.
You will get your little girl back, it will just take time. Thank goodness you figured it out, or it might have been much worse,
For the next little while can you make her some healing chicken or both broths with just some vegetables in it. She can eat that for breakfast lunch and dinner. Mashed avocadoes with a little olive oil, sea salt and lemon juice. maybe a fruit smoothie with coconut milk or almond milk. Lightly cooked vegetables, cooked spinach, green beans, with fresh fish or oranic meats, cooked squash or sweet potato? Let me know if I can help anymore..