When transitioning from one insulin to another we take the data from the current insulin into consideration. When switching between Vetsulin and Lantus, usually the same dose can be started with Lantus. The one caveat to that is occasionally a cat can have a strong reaction to a new insulin so it's best to the do the switch when you can monitor closely for a couple of cycles.
The nice thing about Lantus is that it is better at holding good numbers than pulling down high numbers so drops in BG tend to be slower and less steep leaving lots of time for steering to keep kitty safe.
The Lantus forum is a busy place so when posting over there, we ask everyone to put the date of their post, their kitty's name and their AMPS and any question you might have in post title. This helps ensure that anyone needing help ASAP is looked after. We can get into that nitty gritty later. In the meantime, when you have a few minutes, I'd suggest you read through the sticky's at the top of the Lantus Forum to get a feel for the differences between how it and Vetsulin work. There are 2 dosing methods and you will be asked to choose one so that folks helping can provide you with consistent and appropriate information. TR (Tight Regulation) is more aggressive and has a great track record for helping cats go into remission. SLGS (Start Low and Go Slow) is also good, can get a kitty into remission but the method is less aggressive. It's entirely up to you which you choose as long as Maus is on a strictly wet diet. If there is any dry food in her diet, then you can only use the SLGS method. The sticky describing both methods is
HERE.
No apologies needed. You are not bothering us at all. We are all here because we want to help. Do try to get, at a minimum, a before bed BG reading as many if not most cats, go lower at night than they do during the day. And when you can on day cycles, grab a test between +3 and +7 to see what Maus is up to during that period which tends to be the most active for Vetsulin. Any data you can collect will help us make recommendations about what dose to start her off at with Lantus.