Hi Sue...Sorry that nobody got back with you before shooting, but looks like you handled it!
In the future, you have a few options when shooting a lower number...You can Stall, don't feed, and test every 20 minutes or so and then as long as the numbers are going up, you can be pretty sure that the last shot is wearing off and it's OK to go ahead with the scheduled dose. Remember, when you shoot, you're also going to be feeding, and Lantus doesn't fully "kick in" until around +3, so as long as the numbers are going up, it's usually fine to go ahead and shoot
It'll be important that you get comfortable shooting lower and lower numbers too....that's when Lantus works best! Once we have enough data on how our cats respond to insulin and food, most of us will shoot anything above 50 (that's 90 120 for you since you're still feeding some dry so have to stick to the SLGS protocol instead of the Tight Regulation protocol---And using the AlphaTrak meter)
You can also do what you did and shoot a reduced dose....but if you find you're getting pre-shots too low to shoot, it's usually because the dose is too high to begin with. Lantus needs to be given at the same dose to work it's best, so every time you change dose, it throws it off
Another thought I have is that you may have increased too quickly....We usually only increase in .25 unit increments and it looks like you've gone up in whole units each time you've increased. One of the peculiar things about insulin is that too much can look like too little! It's important to go up slowly so you don't go past what might be a "best dose" for your cat.
I have to think that it's possible Frankie was started out at too high a dose to begin with. It's my understanding that he was started at 3 units? Is that correct?
Are you going to transition him onto low carb canned and get rid of the dry? Getting the high carb dry totally out of the picture will help in getting him under better control a lot easier