If you're just going to skip then give him some food, and test before you leave. You can even give him a little medium carb or higher carb food. With skipping, he will be using the depot, so he will still have insulin being used, so get an out the door test. If he is still low, then leave out some higher carb food for him, if you can. Or call in late to work. Or find a way to come home at lunch to check on him. I know I would be nervous in your shoes.