Tals, I think the thing that would be most helpful in helping us figure out how to help you move ahead, is for you to hold this dose for the next few cycles, and get at least one preshot and one mid-cycle test in both morning and evening. Sometimes there are hidden low numbers in there and a cat will bounce (I linked you some info on it above) and then remain high for the next 3 days. The most helpful pm cycle test is probably just before you go to bed. During the day, I think anytime between 3 and 8 hours after the morning shot would be good. Because we have people here from all over the world, we measure time in + hours counting from the last test - so if you shoot at 6am, then +3 is 9am and +8 is 2pm.
If you can get 4 tests a day for 3 consecutive days while you hold the dose constant, we ought to be able to tell from those tests if you need to increase or decrease the dose.
Is that something you might be able to do?
While he is high it's also important to test him frequently for ketones.
Here is a good information post on them. Since he had DKA at diagnosis, the risk is present for him to develop ketones again and that's a dangerous situation we want to avoid. If you see a trace of ketones, please post immediately and ask for help. Trace ketones can be dealt with at home - more than small requires a vet and can become a crisis in a matter of hours.
I'd also encourage you to post on the
Lantus/Levemir Insulin Support Group. That's going to keep your sweet Shimi on the radar of those who all use Lantus and Levemir, and many people there can help you. Don't worry about the lingo or the subject lines - for now I'd just encourage you to post there so we can keep an eye on how Shimi is doing.