My 15 year old cat was diagnosed last May 2010 and was put on Novulin. After glucose curves done every two weeks for months, the vet could not regulate his insulin. It rarely got below 300. She suggest PZI around January. It has had better results and she increased the dose until he is presently on 4.5 units/twice per day. His levels are not never below 250 and increasing to around 375. I have begun doing my own glucose tests at home because of the $55 every two weeks charged at the vet. I am really getting frustrated as he continues to go down hill. He begs for food constantly and drinks water at an alarming rate. He was supposed to go back to the Vet today, but I canceled. I don't have to have them tell me his glucose levels are high. I just don't know what to do with him to get his levels down. I tried cooking chicken and giving him that, but he's grown tired of it and I didn't notice a change in numbers. My Vet hasn't focused much on his diet, and has given hime the W/D prescription food, but I'm noticing on line that appears to be high carb. Any suggestions at what I can try on my own? The PZI is at a really high dose according to the package insert. Any suggestions would be appreciated!