About a year and a half ago our cat Grady was diagnosed with hyperthyroidism. After 6 months of topical treatment we decided we would opt for the iodine radiation to get it over and done with. He seemed to come out of it fairly well, but over the past few months we've noticed him slowing down, sleeping a lot (even for a cat), and drinking a lot of water. Last weekend we decided to take him in to the vet to see what was going on. They took his blood and urine and sent them off to the lab for analysis. The results, which were read off to me over the phone by the doctor's assistant (I was trying in vain to write everything down), seemed to indicate that Grady had Diabetes Mellitus. His blood glucose level was at 18, and I was told normal was around 10. In addition to that, we were told that his BUN (not sure what that is) and creatinine levels were elevated (creatinine 278 vs 189 which would be in normal range). They recommended starting him on the Hills Prescription Diet k/d in order to help his kidneys. They're telling me he needs a low protein diet so his kidneys don't have to work so hard processing the food, but after doing my own research on the internet I'm not sure I agree with that. They also wanted to start insulin injections as soon as possible. No mention of a low carb diet was made or how that might change his glucose levels. They're also telling us we need to bring him in several times so they can do a blood glucose curve, which (based on a single visit and lab work at $250), could get very pricey very quickly. The lab work also stated that his sodium and chloride levels were low. So now we're supposed to take Grady in again to get another urine culture and be taught how to inject him. I'm wondering if I should hold off and start him on a low carb diet of only wet food (he usually supplements with a small amount of dry), or am I endangering him by not getting him insulin? I was also given a bottle of PetRemedy's Glucose Support Formula by a friend. I've read that it both performs miracles and does nothing for diabetic cats, so I'd like to get people's opinion on whether or not I should continue to use this. In the past six years I've lost three cats to one disease or another. I'd rather not experience that gut wrenching sense of loss a fourth time in such quick succession. I'd be grateful for any advice I could get to keep my cat alive and healthy for a while longer. Thanks.