Thanks, Tim. He uses Humalog & boluses immediately before eating, sometimes "topping off" after he eats if he eats more than planned. He's almsot 14 and growing like a weed (passed me in height last month - ugh!), so he frequently has a pretty big appetite.
I was thinking along the lines you were - numbers are good on the back end, so just adding more insulin seems like it could make the back end numbers too low. Timing could certainly be an issue, and, as I responded to other posters, it could be what he's been eating. I think he's been kind of light on the protein the past few days.
When he was diagnosed, we were taught that he should bolus after eating - that seems to be the standard recommendation for kids these days. A few months after diagnosis, as I started to get more educated, we made the switch to bolusing before eating but that has been a hard switch for him. I think 30 minutes before would be a stretch and a battle, as well as requiring more planning ahead than my teenage son seems to be capable of these days! Maybe bolusing before setting the dinner table or prior to making a sandwich for lunch would be a reasonable starting point. That would give his insulin a few minutes' head start or so. His insulin seems to kick in quickly, so maybe just giving it a few minutes earlier would work on the spike without the hypo risk.
Thanks for chiming in!