Hi, I am Elzabeth and my 12 year old female cat, was Kanika diagnosed last November. I am working with my vet to get her BG under control. She's getting 2 units of Lantus Solostar 100 every 12 hours. The BG went down but then went back up. One of the things the vet suspects is that the insulin got weaker after a month. Has anybody dealt with this problem?