I'm new and still trying to get a profile and google docs uploaded. But in looking over the posts, I'm not seeing many that have cats going over 300. Xuxu is 14 yrs old. He was neutered 3 months ago and his blood test at that time showed only a slight increase in liver enzymes, which we later realized was the beginning of pancreatitis and he has been treated. A month later he went DKA comatose, and my incredible vet brought him back. He is yoyoing between >750 and <100. He's on Lantus and we've been trying to get him regulated for over 2 months now. We are force feeing him FancyFeast canned fish. He's been on dry Iams all his life and that's all he'll go for on his own. It seems like his BG settles down for a couple of days on a regular dose, then goes off kilter again. He's crashed 4 times now, and been below 50 when I caught it before symptoms several more times. So is this rare? My vet says she's never seen anything like it and we are calling specialists all over the country. But talk with 3 specialists and get 3 different recommended protocols. It's very frustrating.