hi phyllis!
yes! your ss is working - and wow, it looks like Nonnie is having a good response to the insulin. You're doing a super job of getting tests in.
one thing that will help you to know is that Lantus is a depot type of insulin, which means that when you inject it, some is used right away and some builds up in the body. that build-up is called a depot or shed. it's an important concept to understand, so much that Jill has a yellow starred sticky at the top of this forum page
here. There are a few implications from using a depot insulin.
one is that a previous dose can still impact numbers as many as 6 cycles later. A dose reduction, in other words, can take a few cycles to show what the newly reduced dose is doing.
another is that changing doses frequently can cause wonky numbers, making it so you can't really see what a dose will do to his blood sugar numbers.
it's also a more gentle way of administering insulin, compared to earlier insulins. Sienne likens dose changes to moving a barge - it takes a while for the changes to take effect. earlier insulins were given with food, dropped the blood sugar and then were out of the body in a matter of hours. then the cat's blood sugar rose again and the process was repeated. we know that cats do best and feel better when their blood sugar is flattened out.
Lantus also is different from those other insulins in that the dose decision was based on preshot numbers in shorter acting insulins. People on the PZI group have a sliding scale - if you get x preshot then you administer y dose. We hold most lantus doses 6-10 cycles and re-evaluate to see if what it's doing unless the cat goes under 50.
All of that combines together for me to suggest to you that you hold his dose for at least 6 cycles unless he goes under 50. I'm not sure what dose that should be - can you answer the questions below and we can talk about it?
I saw you mentioned that Nonnie has been diabetic for more than a year. How long has he been on Lantus? What is the story of how you got to a 5unit dose, ie, what kind of increments was his dose adjusted in (1u? larger or smaller?)