Hi, my cat Peanut Butter is around 16 yrs old, orange tabby. He used to weigh almost 14 lbs! we put him on canned food a couple years ago and he went down to around 11.5, and looked great. well, this last June he started losing weight and looking ill, so I took him in and he was diagnosed diabetic :/ I began treating him right away with Prozinc (have now switched to Vetsulin) 1 unit 2x a day, and feeding him only Fancy Feast's lowest carb cans- 2 3oz cans a day. In June 2017 he weighed about 10 lbs. He (as of today) now weighs about 7 :/ He continues to lose weight and his appetite is CRAZY. He cries all day for more food. I have taken to feeding him a snack of a hard boiled egg between feedings. This is very difficult, and I am at a loss why he stays so hungry and loses weight. I have bumped his dose up to 1.5u 2x a day.. it doesn't seem to help the hunger. I bought a human BG tester, have thus far been unsuccessful in getting a sample... I'll keep working on that, but for now- any ideas???? the vet is too expensive for me right now. We took him in and he says well, maybe he has kidney problem,s he's old. (he felt for thyroid problems and didn't feel it was swollen) thanks for any suggestions.