Marty,
I can't really answer that question as I don't know prozinc, only Lantus, so the only suggestion I have for you is to post over on the PZI ISG and ask those that use your insulin. If it was Lantus, with no more data than is there and if I'm using your notes correctly I would have to wonder if it was just her shed filling, but I don't know one way or another if Prozinc has that kind of action.
Mel, Maxwell, Musette & The Fur Gang