OK, so he eats at AMPS, but not much, only a 1/4 can. That's at 3am.
Then he eats "brunch" at 7am (+4). 1/2 can
Another 1/2 can at PMPS at 3pm
Then a 1/4 can at +8 at 11pm.
So,
With everything else being equal, you would expect him to not have any food in his system at 3 pm, since it's been 8 hours since that half can brunch. So no food upping his PMPS number. And he pretty much hoovers it down, so it would be upping BG for a couple hours until the shot kicks in, probably around +2 or +3. His night cycle "should" be normal and his day cycle should be wonky, BUT HE DOESN'T AGREE WITH ME!
So you should see a rise between PMPS and say +3, then a drop to nadir (around +6?). After that, a couple hours after nadir, he eats, so he should rise pretty quick since the insulin is wearing off as the food goes down. Then no food till AMPS, but also nothing pushing his BG down till then.
At AMPS, he eats a small meal, so the rise would be smaller and the insulin drop should be bigger during the "day time" cycle, but right about the time the insulin should be working well, he eats a larger portion. That food would be hitting him right about when he should be at the daytime nadir, so you shouldn't see a low nadir during the daytime cycle.
So as far as his food goes, the feeding schedule should be giving you a better nadir overnight than during the daytime.
OF COURSE, that's exactly the opposite from what you have seen over the past week! So, let's figure out why this is....
You can see that the snack at 11 PM looks like it pushes up his number from +8 to AMPS by only about 100 points. That's a 1/4 can. So, you would figure with a 1/4 can at AMPS, he'd only go up about 100 points from it. (Keep in mind, this is just logical math, not necessarily what really happens!). He drops about 100 points or less in the four hours after AMPS, then you feed him and he probably doesn't go lower at +6 because he's got 1/2 can of food stopping him. But yet he seems to defy logic, and drop from +4 to +12??? Except for yesterday and today, when he was "normal" and came up like logic says he should.
Here's what really stumps me - no way should he be climbing on his PM cycle. I don't see that it can be a bounce from what happens during the AM cycle, because he isn't dropping steep or far.
Lisa, this makes no sense!
Here's what I think I would try.
In the AM, he eats small at shot time, and big at +4
In the PM he eats big at shot time, and small at +8
Can you switch the portion sizes in the morning, so that he eats 1/2 can at shot time and only 1/4 can at +4? I think it might improve his daytime nadir a little, because it would reduce the amount of food that is fighting the insulin once the insulin kicks in. That might make his PMPS reading make more sense too.
What's anyone else think?
Carl