Welcome to the FDMB!! We'd love to know your name...and of course your sugarcat's!!
It'd be really helpful if you'd start using our spreadsheet to keep track of his blood glucose numbers....it's really a very valuable tool here and we depend on it to see what's been going on before giving much in the way of dose advice
Here's
Instructions on getting the FDMB spreadsheet
The other thing is with Lantus, it craves consistency, so the AM and PM dose should be the same. Other, older insulins were dosed more based on the Pre-shot blood glucose, but with Lantus, it's dosed based on how LOW it takes them
It's important to get more testing in to really see how your kitty is doing. We always test before shooting....otherwise there's no way to know if it's safe to give insulin at all!! Then to try to see how well it's working, we like to get at least a mid-cycle test on the AM cycle (if at all possible!) and then a "before bed" test on the PM cycle. Most cats go lower at night, so getting that "before bed" test is really important to see if you might need to set an alarm and get more tests in later on!
It's GREAT that you're learning to test at home!! Cats that are only tested at the vets are missing a lot of data and we've had a lot of people join us after only getting tests at the vet and come home to a cat in a hypoglycemic crisis (or worse)
Cats also respond to vet stress by going higher...up to 200 points!! So your vet tests, see's artificially inflated numbers due to stress and thinks the cat needs more insulin.....then you go home and the cat relaxes and you're overdosing.
I'm not sure about the Natural Balance food you're feeding...the fact that it has "green pea" in the name makes me think it might be a higher carb food (since peas are a type of starch that breaks down into glucose) We recommend feeding a low carb (less than 10%) food to our sugarcats.
Here's a list of foods that are under 8% carbs BUT it's important that you're testing while you're lowering the carbs....decreasing the carbs can bring the blood glucose down a lot too!!
Keep asking questions!! We'll do all we can to help you!!