As far as the little girl goes, I experienced the hypoglycemia with a maltese I had, I always keep karo syrup on hand, that works just as well as the nutrical, and as far as your little boy goes, he's precious, and looks very much all yorkie to me..with his weight, I think you may have yourself a big boy..
My big one weighs 14 lbs. but is a real sweetie(most of the time)..
Congrats on your little guy..