Hi, Jen and welcome to Lantus Land.
I've tried to speed read through your thread on Health and I've been looking at your SS. I've asked a few other experienced Lantus users to stop by, as well.
I'm in a quandary. I understand why it was suggested that you reduce Shadow's dose. I'm just not sure that it's a suggestion I would have made. It's very hard to know if, in fact, Shadow was bouncing. It may be that it will make sense to fast track the dose in order to get Shadow out of these high numbers. I also think what makes this even more of a guessing game is that there isn't much history of what insulin Shadow was on and how he was responding while at the shelter. If I had to hazard a guess, my hunch would be that Shadow's dose is going to need to go back up because there's a good chance that glucose toxicity developed over the course of his time at the shelter.
I'm also going to make an assumption that as a critical care nurse, you're pretty familiar with diabetes -- at least in humans. I don't want to presume what you do or don't know so please let us know if you need a further explanation. There's a great deal of information in the starred sticky notes at the top of the Board. The information will help you get oriented