It could as leggot say be her levemir out.
I would try a morning fasting test to see what her basal is up too, this will give you a better guide to how to tackle her breakfast jab..
As it may be a complination of factors..
Some of the problem could be to do with her resistence during the morning and she's crossing over from one to the other.. So the hypo is being caused by the tail end of the novorapid being more effective due to less insulin resistence at that time of the morning/day..
You could try pulling her injection forward, so instead of injecting the 10/5 minutes before breakfast you inject 15/20 minutes before, so that the insulin in starting before she starts spiking! It might also help with the tail end of the insulin effect burning out before her resistence factor changes..
It might be that changing something like Aprida insulin, which hits the system and burns out a lot quicker than novorapid or humalog would be a better.. So it's out of her system later in the morning..
I get a time slot in the morning, where I get problems with cross over of insulin resistence if I eat at 10am my carb/insulin ratio is correct and I have no probs through to dinner time, but if I eat between 10.15am-10.40am I get the problem my ratio's are the same at 10.am, but this puts me in the pardigament that the tail end of my insulin hits my lower ratio point causing a hypo...
When I was on injections I sort of just avoided eating around this time, if I did I would dependant on my levels either inject all about 25 minutes before hand, if BG was on the low side, I split my injection, enough to prevent hypo before I ate, but enough to get into the system, then I would inject the rest when I ate.. Life is so much easier on a pump, still haven't fully resolved this time patch with out having to faff... So tend to avoid eating between these times..