Jet, my sweet lovable Tabby is about 8 years old with Diabetes for 5 years. He has been on IDEXX PZI during this time. I was able to buy multiple bottles when it was discontinued but am running out now. I have been reading online trying to determine what's the best solution to replace the IDEXX. I read that compounding is not always consistent which seems unacceptable for insulinn. Jet has been getting 2 units of U40 twice a day for several years and has been doing well. He eats 1 can of Purina canned DM everyday.... spaced out 8 am w/shot, snack at 10, lunch, 2 pm snack, 5 dinner, 8 pm more food w/shot and 10 night time snack. Snack means he gets a smaller amout of the one can I parce out during the day. Does anyone have positive experience when switching your cat from IDEXX PZI to a dependable, safe replacement insuslin? I am so worried about changing this precious little guy's insulin.