There are a few questions members will ask when you start a post here and you are looking for dosing help. Some of those questions are, what insulin he's on, what food he's eating, and since you are home testing (good for you!), they'll ask if you could put those blood sugar values in a spreadsheet so we can look at the data over time. That information can be put in your signature, details in this post.
New? How You Can Help Us Help You! Let us know if you need technical help doing that, we have people here who can help.
I see from reading a previous post here that your cat is on Lantus. Is he still eating some high carb dry food? That can make a huge difference in blood sugar numbers. More details for people reading in that post:
https://felinediabetes.com/FDMB/threads/newly-diagnosed-diabetes.283145/
Lantus is a depot style insulin, meaning that over time at a dose, the depot will build and numbers get better. We typically stay with the same dose for 5-7 days when you first start giving insulin, so we can see how that dose is doing. Jumping around in dose doesn't help us figure out how a dose is doing.
There are several reasons for higher numbers, but those higher numbers are all very typical for newly diagnosed diabetics. My cat was in very high numbers for quite a while (months) but I did manage to get her regulated eventually. Please be patient as we try to figure this out. A short period of time in high numbers won't hurt, as long as you are testing for ketones and they are negative. The high numbers could be due to too high an dose, too low an insulin dose, too high in carbs food, sneaking food from elsewhere, and other issues such as infection or inflammation (eg. needing a dental). Figuring this out takes time. Please pick a dose and stick with it for at least 5 days. In the mean time, test for ketones as Chris suggested in your first post.
