Hi. My cat Mercedes was diagnosed about 3 months ago. She was put on Prozinc which worked the first time only dropping her BG from over 400 to in the 80's. That was 3 months ago. Ever since then her readings have been in the 300's. My vet switched her to Lantus about 2 weeks ago. Started out at 5 units am and jumped her up to 10! Nothing pm. Saw him yesterday her BG was 339. Now he wants her on 16 units!!! 8 and 8. I personally think this is way too much. I've changed her diet and have an appt with a new vet on Saturday which was highly recommended. I can't wait! So far she is acting ok. She's eating and was even playing a little last night. The old vet seemed to not want to talk about diet at all and seemed a little annoyed that I was doing research. New vet will teach me to test at home I heard. Thank god! I'm just scared this dosage is way too high! I'm calling her in the morning to see what she thinks. It's all so confusing!