Although they are a tad high they are not disastrous, could he be sickening for something? A cold, low lying infection, or I’ve found even just tiredness or lack of sleep can affect my BG,
Allowing for the accuracy of meter there not much difference in the readings so not really climbing but more a steady line. Keep an eye it could be just a blip there are lots of reasons other than food that affect our BS, stress is a big one so worrying about his numbers may be not helping either