It's very difficult to advise on such a little dot. But don't be panicked by the hyper, are we saying bloods in
the teens. Keep testing her bloods & the chances are they will start to drop .it's very easy to over correct a hypo food wise & hyper insulin wise it then becomes a roller coaster. So small corrections are in order.
As an adult with a blood sugar of 3.8 at a diabetic clinical app the consultant insisted I drank 100 mlls of lucozade & eat a round of toast. The result c being when I arrived home my blood was 17. I knew all I needed was a few sweets. But a short period of high bloods is not the end of the world . So don't panic.
Hope this helps a little. If her bloods go into the 20s please phone for medical advise ,because we can't advise on insulin doses.