I would not worry about the higher numbers as long as you are appropriately responding with dose changes. For the most part, diabetes is managed around the rest of the cat's life - other health issues, etc. See how he does on the higher dose - give it time to settle and get more BG numbers so you know how he is responding to the dose. You need the preshot numbers as well as midcycle tests to see if he has high numbers from too little insulin or from too much insulin.
His BGS may be up slightly now because his is eating more - but he NEEDS more food. You can't control BGS by withholding needed food (not talking about a cat that is clearly overweight needing to slowly lose weight. That's another issue). But his BGS may come down again later.
I did find, with Jeddie, that as he gained his weight back, his BGS climbed and he went back on insulin. When I got him, his record said he had weighted 8.1 lbs a month earlier, but his old weight was 13 lbs! Since he was a Maine Coon mix, he should have weighted 14 lbs. So, he needed those extra cals and to gain back some weight. Even though I had him off insulin for 3 months and he needed to go back on, possibly because he was eating a proper amount and gained some weight back (he never got above about 11.75 lbs again), I didn't worry. It was just something that had to be that way.
