Hi Andy,
Well, when I look at Lizzy's spreadsheet, I'm not seeing a really bouncy kitty, so that's good.
Very basically (and there's lots of longer, better explanations on the board) on what a bounce is.
When a cat's blood glucose goes low, their body will react instinctively by releasing "glucagon", "glycogen" and counter-regulatory hormones into the blood stream. This causes the BG to rise, usually significantly. It usually makes them stay higher for a day or longer too.
By "low", that doesn't have to mean hypoglycemic low. Just lower than what the body is used to. A cat who has been running in high numbers in the 350-400 range can bounce if the numbers drop a couple of hundred points. Because the cat isn't used to BGs in the 100-200's range.
In Lizzy's case, with all those blue numbers and higher green numbers, I don't see any number that would be "too low" and cause her to bounce up higher. I also don't see really high numbers that look like "bounce" numbers. If you saw a 50, and then she went up into the 200s or higher, that would look like a "bounce". Her numbers overnight might be lower than in the daytime, but still, you aren't seeing a much higher (in many cases it's lower) reading in the morning that would make you think she's bouncing.
I think tonight's 165 is still okay. Rather than indicating a bounce, it may just indicate that the dose needs to go back up to .25u.
But before changing anything, let me ask over in the Lantus forum and see if someone with a lot more experience than I have with Lantus specifically can take a look and tell you what they think?
Overall, Lizzy's numbers look great to me.
Carl