Welcome! Glad you're reading the stickies. Any questions - just ask. We are a small but friendly group. If you have an emergency, post here and on Health so you get the most eyes. If you read the threads and look at spreadsheets, you'll see how ProZinc is working for others.
Canninsulin and ProZinc work similarly, no depot and usually with a smile curve. It looks like Romulus bounced a lot on Canninsulin, or the insulin didn't last long enough. He may still bounce on ProZinc, but if duration was the issue, the cycle may improve.
It looks like he was on 1.25 most lately on Canninsulin with some blue midcycle. Two units seems like a big jump up in dose - monitoring the first few cycles will give an idea of how that works. We usually suggest cutting back a smidge when switching from one insulin to another, not increasing.
Could you please start a new spreadsheet for ProZinc? With my IPad, it takes a long time to get down to his latest doses.