Please have a look thru this stickie:
New to the Group: http://felinediabetes.com/FDMB/viewtopic.php?f=9&t=157
in here you will find this chart:
Learn how YOUR kitty is responding to insulin:
Onset - the length of time before insulin reaches the bloodstream & begins lowering blood glucose
Peak/Nadir - the lowest point in the cycle
Duration - when the insulin is strongest or works the hardest
Example of a typical curve:
+0 - PreShot number.
+1 - Usually higher than PreShot number because of the last shot wearing off. May see a food spike in this number.
+2 - Often similar to the PreShot number.
+3 - Lower than the PreShot number, onset has started.
+4 - Lower.
+5 - Lower.
+6 - Nadir/Peak (the lowest number of cycle).
+7 - Surf (hang around the nadir number).
+8 - Slight rise.
+9 - Slight rise.
+10 - Rising.
+11 - Rising (may dip around +10 or +11).
+12 - PreShot number.
This is an example, doesn't mean test every hour, but your key times would be +3, +6, my personal favourites +9 and +11
You may not see anything significant in the first cycle, Lantus takes a bit of time to build up a "shed" like a storage depot...more on that in this stickie:
http://felinediabetes.com/FDMB/viewtopic.php?f=9&t=150
There are quite a few experienced users here who can guide you with the dose, so I will leave that to them. Libby is one them!
Can you tell us how many hours till your due for the PMPS (PM preshot)?