Our cat, John Denver, was diagnosed in 2017. We were able to get him to a state of remission after just a few months of testing and treatment. Changing his food was our first step, and it seemed to work well. A few months ago, he tested quite high, so we began to test him regularly (twice per day) and inject him with Prozinc when needed. At the onset of this most return to diabetes (for lack of a better phrase), I was withholding insulin if his number was below 150. I changed that once I noticed he hypo'd (a low number of 49--some Karo syrup got us out of that one), so I began using 200 as my benchmark because I was scared of inadvertently killing him. Anyhow, I am having trouble figuring out what to do. He has days on end where his glucose doesn't reach a shootable number, and other times where it's crazy high (for him--this is anything about 200). It seems wild and unpredictable. Today, especially, has been bad. His morning number was 222, and he just tested at 295, his highest number since September. This forum has been invaluable to us as we try to keep our cat healthy. Any advice at all would be greatly appreciated.