Alex was diagnosed about a year and a half ago and I had him on prozinc which never seemed to work well for him, but I couldn't seem to get a vet who would be willing to switch and would always blame something else and would want to run more and more tests. 1.5-1.75u would leave him too high but if I went just a little over and gave him closer to 2u within 2-3 days he would swing into hypo range, every time. He was "fine" living with high numbers, but eating and drinking too much, losing weight and muscle mass, and I know it's doing slow internal damage. Now switching to Lantus and yesterday was scary because the numbers were so high all day and I could tell he was feeling awful, but this morning it's really quite low (for him), but I still gave the full dose. It's hard to remind myself that this is what we're looking for and what is supposed to be happening, because I've spent so long knowing that anything below 20 required a dose reduction or he'd swing low. This might be a high number for the rest of you, but this is scary low for him. I feel like a new diabetic cat owner again, despite all my experience. I will be watching him very, very carefully today but I really hope that this is the right move for Alex and will finally get his diabetes under control.