I often wonder what would have happened if we would have switched to wet food from start, rather than that stupid Virbac, or what would have happened if we would have started Lantus rather than going with Vetsulin/Caninsulin for almost 2 months
But it is what it is, we're doing good progress and we're grateful for finding the board.
You followed vet's advice. Not alone in that. Neko was on Caninsulin for 3 months (per vet) before we got her switched to Lantus. It took her much longer to get regulated, but she had a couple other conditions making it trickier to do.