Hi. My 11 year old cat was diagnosed last Saturday as being diabetic. His reading at the vet was 663 but it was a very stressful trip and when I checked it at home the next day it was 290. He gets 1 unit Lantus twice a day. I also switched his diet the day he was diagnosed to a low carbohydrate diet. I will do a glucose curve Saturday but in the mean time I take a reading each evening before his shot. The glucose level went from 290 to 237 to 212 to 264 and today it was 283. Is it normal to have this initial drop and then for it to increase? Thanks