The last test before your preshot test will be at +10 (SS speak). Take all food away then. At +12 do your pre shot test, feed him his supper and give him 2 units again. He doesn't have to eat all his dinner - even a tablespoon or so is enough if he's a slow eater. Lantus is slow in onset so he doesn't need a lot of food on board. He can finish the rest of his dinner after his PM shot.
Try to get a before bed test this evening just to see how he's doing. You can leave a bit of food out overnight or not. I don't feed my guy at night either. If you leave any out you have to know that he'll have eaten all of it by the 2 hours before his AM pre shot test. In the AM it's the usual routine:
- pre shot test (no food 2 hours before)
- breakfast (at least some of it)
- insulin injection.
Is he usually a good eater? That will help you enormously. As far as insulin dose in the days ahead, I'll suggest staying at 2 u for a few days while you get the new testing routine up and running. We need more data to see how he does on this dose before changing it. No need for a curve again tomorrow, just follow the basic testing routine I gave you earlier today.