Welcome to Lantus Land!
Nice job getting your spreadsheet (SS) set up!!
First, I would pick up a box of Ketostix at your local pharmacy. The box of 100 runs around $15 and is much cheaper than the strips for a Precision meter. The Ketostix will let you test for ketones as much as you'd like without feeling like you're going to go bankrupt. I would test ketones daily if you can until you see Enana's blood glucose numbers are in a good range.
If you have just started testing, we generally encourage people to do mini-curves (i.e., testing every 3 hours) until your Lantus dose has stabilized and you have a depot (we call it a "shed") formed. This takes 5 - 7 days. The other reason that we test is that Lantus dosing is based on the lowest point in the cycle, the nadir, not on the pre-shot blood glucose (BG) value. Without getting spot checks during both the AM and PM cycle, you won't be able to make informed decisions about dose.
Please take a look at the starred, sticky note on the
Tight Regulation protocol. One of the things you will note is that Lantus likes consistency. You want to shoot the same amount of insulin every 12 hours. If you are concerned that Enana's numbers are too low, it would be better to shoot the 0.5u twice a day than shooting 1.0u in the AM and 0.5u in the PM.
If you are not already doing so, you will want to be feeding a low carb, canned food diet. We can direct you to the resources for finding low carb food as well as reading on feline nutrition.
The other sticky notes at the top of the Board are a wealth of information about how to care for your Lantus, becoming oriented to the group (including info on how to do a curve, our slang, etc.), key concepts such as the "shed," and how to become data ready to shoot low numbers.
Please let us know if you have questions. The people here are very generous with their time and their knowledge. We're here to help.