Re: 2nd day of Prozinc. +6reading higher than before am shot
This is a process, not an event - figuring out the best dose for your cat is going to take some time.
Multiple factors go into how the cat responds: starting glucose level, carbs consumed, activity level, insulin type, insulin responsivity, timing of insulin vs eating, and more.
The fewer things there are that vary, the less difficult (we won't say its easy!) it becomes to figure out what works.
So - aim as much as possible for a consistent shot time, consistent insulin dose, consistent carb level, consistent feeding time, and consistent activity levels. Then you use the data on pre-shots and additional mid-day glucose readings to adjust the dose, again while keeping everything else consistent.
Also, get urine testing strips (ex. ketodiastix) and monitor for ketones, especially if you are seeing glucose levels in the 300s or higher.