Hello everyone. My cat Baxter was diagnosed about five weeks ago . He is on the Lantus pen and we started him at 2 units twice a day. He is now on 3 units twice a day and I am doing my second glucose curve today which is still horrible . Blood sugars are 5 to 600 and I'm questioning whether Lantus is doing anything at all . I've wondered if the insulin was bad, but it is only about a month old and I have kept it in the refrigerator as per my vet's instructions . Baxter is 15 years old and 13.5 lbs. he weighed 15lbs before he was diagnosed . Should I be switching to a different insulin? Also, my vet told me I needed to use a meter calibrated for animals as there blood sugar is measured differently than humans, so I cannot use a human glucometer and am using AlphaTrax2 . Yet I read that people are using a human glucometer???? So confused about this. I certainly need to know I am getting accurate glucose readings . Thanking everyone in advance for their feedback .