how long does it take for insulin to start working? Molly started insulin on Sat 1 unit twice a day. Lowest reading has been 297; tonight was highest yet at 448. I assume we probably will need to increase dose, the vet wanted to start off small which I definitely agree with. I talk to her tomorrow but just curious from others experiences when it actually starts helping regulate? Could I be somehow giving the insulin shot wrong? (I worry about this a lot)