Hmmm... I agree with Sienne and Jeanne. It's a big dose, hard to say whether or not it's appropriate for Jerry right now. Going up a unit at a time, it's very possible to skip the right dose, although as Sienne says, there are definitely high dose conditions that can require that much, or even more, insulin.
It's great that you are home testing! That's the absolute best way to not only keep Jerry safe, but to be sure you are giving him the right dose of insulin. We can definitely help with that, after we are able to pore over the BG data you have been able to collect (and the data you'll be collecting in the future). In the link Sienne gave you, there should be instructions for setting up a share-able spreadsheet (we use a common template) where you can input the numbers you have. Once we see those numbers, we will have a better idea of what is going on with Jerry, and whether this dose is too much or (ulp!) not enough.
Out of curiosity, did most of the increases happen when he was on Novalin, or did you switch to Prozinc relatively early?