Thanks to whoever told me to start at .5 on PZI. He'd be crashing again if I'd done any more. The BCP sent us 5 ml free of 100u/ml. I was so hoping it would be 40 u/ml so I could use the other syringes. I've posted his numbers today, and on a Fat .5, he went down to 66. I didn't panic and give karo because I needed to see how low he would go. An hour later he was up to 89. It took 13 hrs and he still wasn't quite back up to 750, but I want to sleep tonight, so I went ahead and gave the 2nd shot as a regular .5 at 734. I wish I knew how to get him to stay down in the 2-300. It just doesn't seem like he's ever going to have an average curve. At least he's happy and purring and eating now. The key seems to be not letting him stay at 750 for more than a couple of hours. He gets tested next week to see what his Eos is doing, whether it's gone back up or not.