I'm with Elizabeth, Susan. The normal advice is for new diabetics not to shoot under 200. But you have some data and are confident testing, so you could safely shoot lower - IF YOU ARE COMFORTABLE DOING SO. Don't do anything that doesn't feel right; your gut is a good guide. Most PZI users whose cats seem to be going OTJ start shooting tiny amounts at 150 and then monitor. If the cat stays in safe numbers at those amounts, they may push it and shoot in the 130s, but only drops of insulin and only if they can test during that cycle. One way to see how others have managed cats whose pancreas is helping out and who seem headed to remission, is to read the Remission thread at the top of this page. Look at the spreadsheets of the cats there and you'll see the different approaches used.
Some people who are doing tight regulation with Lantus shoot at much lower numbers than PZI users do. It's because their insulin tends to last longer, to have a shallower curve, taking longer to get to lower numbers at nadir and sometimes lasting longer than ProZinc. ProZinc tends to have a shallower curve, a faster reaction at the beginning and then dropping to its lowest point at nadir and heading back up. The two insulins work differently. Some lantus users, who have lots of data to predict their cats' patterns and who can test frequently do shoot at much lower numbers than ProZinc users.
The reason I am suggesting a drop rather than .25 is that a smaller amount is safe at the lower ranges, until you see how it affects her. When her pancreas is helping out every so often (and we don't know when and if that'll happen but it clearly did yesterday) I like to advise shooting the smallest amount, when you can monitor. If you can't test at around nadir, I'd be more cautious and probably not shoot at all, just leave out food to graze on (when the pancreas is working, it uses food to help bring down the numbers)
This is the hardest part of the sugar dance, except for those first few harrowing days when you were trying to figure it all out. You want to keep her in low but safe ranges which support that sputtering pancreas, but you want to do it safely, as these days are unpredictable. The good news is that it usually doesn't last long and at the end, you have an OTJ cat. You are asking great questions, and if we don't explain things so you understand them, ask again. You need to feel comfortable with dosing and you need to feel that Mewsette will be safe. Always, always go with your gut. If the advice doesn't feel right, don't take it.
