Oh wow Charlie is such a beautiful, fluffy boy!! You are doing an awesome job with all the testing!
Wendy’s advice is spot on. I have seen with my Bell and many other cats here that a 0.25 unit increase can be night and day in terms of their BG levels. A 1 unit increase carries the risk that one of those “in-between” doses is Charlie’s breakthrough point and you sail right past it.
I had a lot of stress early on with my vet where I wasn’t comfortable with what she was recommending. I didn’t want to just ignore the advice without addressing it, so I would write my thoughts and concerns to my vet through their portal (not sure if you have something like that with your vet). That allowed me time to collect my thoughts and send over some scientific research that backed my point of view. I was extremely careful not to come across as knowing more than the vet, but I was pretty forceful in areas I felt I needed to protect Bell.
I was fortunate in that my vet took the time to listen to these concerns and eventually understood that I had Bell’s safety in mind. I don’t think many vets are used to folks being proactive about feline diabetes. They struggle to even get caretakers to commit to giving insulin shots.
I really hope the vet stress resolves for you soon, you don’t need any additional stress right now

. You’re doing great! Give Charlie a good fur ruffle for me