too young for D- Firstly, welcome aboard. Sorry that you have to join but you’re definitely in the right place!
When you say every time she eats she shoots up, What do you mean? Is the 250-300 2 hours after eating or 4 hours? Does it come down on its own or do you need to do a correction bolus?
It would be normal for her numbers to go up within 2 or 3 hours of a meal but it should come down on its own if a bolus was given to cover the carbs…give us some more details so we can be more helpful 🙂