One of the reasons to get midcycle numbers is to help you see what is really happening. Is he flat and high through the cycle? If so, he needs a small increase. If he drops down 50% (or more) the insulin is working okay and he is bouncing up from the lower numbers. And some cats bounce awhile until their bodies start using the insulin effectively. Some cats will just bounce more if you increase, from higher highs to lower lows.
The other factor is the food. Most cats take a week or more to react to the food and then start down. If you increase too fast, you may hit a day when the food decreases his needs at the same tine as the insulin, and he drops lower than you want.
Those red numbers are scary, but if they are balanced by better midcycle numbers, then you need to be patient. This is a marathon, not a sprint. He didn't become diabetic in a weeek. He won't be cured in a week. :mrgreen:
If he were mine, I'd get those midcycle numbers whenever possible - even if I have to get up at night. I'd give each dose a few cycles and study my data to see what is happening. And because he had DKA, I'd add ketone testing daily. You get the ketone strips that human diabetics use and stick them in his urine stream. If this isn't something he'll allow, we have other suggestions.
With your civie, some cats do have trouble adjusting to the wet food. You could feed him separately if possible, mixing a little wet with a little of his old food and slowly increasing the ratio of the wet. Or try a probiotic - lots of people here like FortiFlora. Many cats seem to have trouble with beef flavors so maybe be sure he gets the poultry.
Hang in there. This is a process that takes some time.
