Hi Laurie! Nice to see you back!
I've been a bit on the fence since the #s have gotten worse as the doses have gotten up. But I just don't see rebound in the #s. I see U-curves with a few flat ones, suggesting to me the dose is not enough. The only time it would seem to me like someone could miss the perfect dose and head to rebound is through jumping up the scale too fast, like moving in 1u increments. Since Angela has gone in small increments and only changed every several days, I don't see that here.
My take is that Blackie probably has a combo of some insulin resistance, making it harder to break through the high #s, and some liver-training-variety rebound, where her liver has kicked in to some extent and said "no, I'm not on board with all this!!!". One thing they used to say to me was "you can't let his body get ahead of the dose." It's one reason to move faster through the doses - when you give them more time to settle, you give their bodies more time to balance it out, i.e you are letting their livers win the battle, rather than getting them trained to realize the insulin is ok.
In my experience, higher #s tend to lead to higher #s, and better #s tend to lead to better #s. To me that's the main flaw with SLGS - it's a nice idea in theory, but the longer they sit in higher #s, the more insulin they tend to need to bring the #s down, so in that sense to me it can be counterproductive. From what I have seen, cats tend to do better when they get more insulin sooner, rather than the other way around. I'm a big proponent of SLGS when you are looking at stuff like 1u increases every week - that's too fast IMO, but the 0.2u increments are so tiny, I think you can go a lot faster with them. I guess I'm a fan of SLGSBNTS - Start Low Go Slow... But Not Too Slow! :lol:
The biggest question I think is how Blackie is feeling. One thing that pushed me to start feeling like she needs more insulin was when Blackie was just hanging out by the water bowl all day. When the symptoms are flaring up and I'm not seeing signs of rebound, more insulin seems in order to me. The only other choice I see is reducing the dose and going with early shooting, or switching to another insulin - she may just be one of those kitties who doesn't respond well to PZI for one reason or another. I think it's too early to conclude that though, and I think early shooting is too stressful to contemplate unless there is a clearcut pattern that indicates a cat is getting shorter duration, which I'm not sure is even really the case with Blackie.
Anyhow, hang in there Angela!!! The good thing about the board is that we all want what's best for you & Blackie, and although the discussions can end up at times leaving you even more confused, I think it helps to get the discussion out there - we are all looking at the same data, and it's useful to talk through what we are seeing and try to interpret it together.
To some extent there are personal preference differences in how to approach dosing, which is the downside perhaps of PZI's flexibility. But the upside is that there isn't one right answer - there are a variety of approaches that all may work well (or all NOT work well, LOL!). Ultimately your strategy is guided by her needs - if she is feeling well, you have more leeway to be more conservative with it, if she is having more symptoms, you need to be more aggressive.
p.s. Angela, part of the newbie toolkit is a BIG box of kleenex and a boatload of chocolate (and some stiff drinks if that's your thing!!!). Believe me, we have ALL been there, I can't even tell you how much of a train wreck I was when I was struggling though this stuff with Bix. Give yourself a pat on the back, you are doing awesome, and don't let yourself get too worried about the #s and stuff. As people like to say, it's a marathon, not a sprint. If one thing doesn't work, you try something else, and sooner or later it will come together.