Sorry to hear about your granddaughters problem. She is so young to have to go thru this ordeal. I have gastroparesis where the stomach does not empty properly. A lot of foods linger in my stomach and causes bloating and impaction. I have been in hospital 3x with the impaction. I know diabetics get this disorder but I do not have diabetes I have autonomic nervous disorder due to spinal cord injury which causes the vagus nerve not to empty my stomach.

I don't know if your grandaughter has this but I know in severe cases they put a pjeg tube in to bypass the stomach. I am on a very strict diet and I am almost starving myself.

I hope more will reply and give you answers that you are searching for. Best to you