Ugh Toby - time to come down a floor or two please!
Peg - sometimes kitties just need more insulin. If you don't see some greens by tonight, I'd think about an increase tomorrow morning. How are his LB habits? Diabetic cats are more prone to UTI's which can raise the numbers. If you suspect something, a vet visit might be in order. If not, it could just be that his insulin needs have changed. I know you haven't had him tested for any high dose conditions, but if he did have acromegaly - the tumor output can change up or down requiring a change in dose. Neko does that occasionally. She'll be humming along nicely on a dose then all of a sudden numbers will go up. I just increase the dose to get the good numbers back again.