Our cat is on Lantus 3U, it was raised from 2U a week ago. He is still not regulating, readings still in the 500's. It all started with an attack of Pancreatitis, out of the blue. Is it possible he is insulin resistant to this insulin or all insulins? These high readings and all the drinking and peeing is so hard to see him go through. He's drinking a cup of water overnight, OMG this is what we took him to the vet for to begin with. How long after switching him to the 3U should they/we be considering changing doses or insulins. Of course the goal would be to get to remission but so far we cant get him regulated. He is so weak, his back legs with less strength. He used to run and play just a month ago. How is this damaging him, the high BS? And the strength in his back legs, his internal organs? How long to allow this to go on with the high BG? Sorry for all the questions but we need to understand what to do. Thanks!