I have a 9 year old male cat (in a house of 4 cats). In December it became apparent that he lost weight. It had not occurred to me yet that he was drinking a lot of water. The vet appointment showed he was diabetic. My vet had me start with Novolin. After several increases, my Luke was still high, water consumption became crazed, i.e., getting into toilets, licking the bathtub. Having never had a readable glucose read, the vet kept him for the day and the sugar was driven down with the fast acting insulin. My vet had me switch to Lantus. After a short bit, his glucose level was readable. STill high (240) but at least registered. I thought we were on the road to recovering. He then had a UTI which became apparent when very smelly urine was throughout the house. That was controlled with antibiotic. Luke was starting to really look better. I took him Friday for weigh in and glucose check and even though he is getting 6 units twice a day of Lantus, he was back in the HI range - not measurable on the meter. He had gained a pound (after having lost 6). I was stunned that the sugar was high. Within a day of that appointment, Luke is now miscellaneously urinating around the house. He also wants to be spoiled with water which of course I am happy to do - any way he wants for now. My vet has never experienced a cat that would not regulate. I do not have limitless funds. The work up and resulting visits have added up to well over $1000. I am increasing the Lantus to 7 and seeing if there is any change at all. Today my vet had a phone consult with me and I know that he is also upset but he is questioning whether euthansia might be coming into the picture. I am having a terrible time with that concept with a cat that "looks" well. Any advice or thoughts would be appreciated. I am very sad and am afraid that maybe I am making my Luke suffer.