She was dropping a bit too fast on the 2 units so may be yo-yo ing a bit, I would hold the dose for at least another 24 hours. Do you have syringes with 0.5 unit markings? If you need to increase I would do so by no more than 0.25 units but it is difficult to eyeball. Unless she continues to increase I would try to stick to 1 unit until you can do a curve, she is still in good numbers. The food may be affecting her numbers a little.