Yes I totally agree re diet. The carb intake makes insulin balancing a moving target , but that's the official line and it's not budging at the moment sadly. She's not even on fortified drinks / protein shakes .Hi. It sounds like she should be on the Basal/Bolus insulin regime with two different insulins. As a minimum it could be twice-a-day mixed insulin. Having lots of carbs to increase weight is usually the wrong approach as there may not be enough insulin to deal with those carbs with resulting high BS. Having lots of proteins, fats, veg etc is fine.
Thanks for the insulin info - it's totally new to me do I am trying to catch up.