My baby Cooper is 15 years old, and he was diagnosed with diabetes at the end of June of this year, just over 2 months ago. He was treated for hyperthyroidism in September of 2020 with the radiation iodine injection treatment. His thyroid has been completely normal and numbers are where they should be since then, but we were told his diabetes is likely due to having gone through that, as well as his age. It has been a very short amount of time since having been diagnosed with diabetes, but we are struggling to get his blood glucose to come down. He is on Lantus insulin, and has a Freestyle Libre CGM patch on him so we can scan his numbers all day and send them to the vet as well. We've been increasing his insulin by .5 units as directed by the vet, but it has not touched his levels at all, he is consistently above the 400-500s. His neuropathy in his hind legs is also very bad, and it's difficult for him to get around. We're discussing getting him B12 with the vet for that, but of course it can only do so much if we can't get his BG down as well... After a random drop over the weekend that had him below 50 and staying overnight with an emergency vet, we've discovered he has a UTI, a high heart rate, and slightly anemic. He was up to 5.5 units of Lantus until this drop, so we are back down to 2 units until we speak with the vet. We can't get him in for an appointment for another 2 weeks to do internal testing to see if they find an issue there. I'm still overwhelmed with how much I'm trying to learn about regular feline diabetes, but now I'm finding out that his previous issue with hyperthyroidism could be why he's not reacting to the insulin the way he should be. Does anyone have experience with both of these and how to go from here? I know a lot of people don't get the iodine injection for their cats thyroid so I don't know how common it will be to find someone that knows both? I just feel like my head is going to explode. Also- being told by my vet that his Hill's prescription dry gluco support food is fine, but I KNOW it is much higher in carbohydrates than it should be. Cooper refuses to eat any wet food besides Royal Canin Recovery food, and that can't be eaten long term due to sugar content. We have tried every wet food, he won't do it, so that leaves us with limited options for dry. I think I'm wanting to get Dr. Elsey's CleanProtein chicken, as it's one of the few dry foods I've seen that is safe for diabetic cats. Do I need to slowly change his food, or can I just put out the new one and see if he takes to it?