Hi Maria!
You've had quite the day!
I don't think I'd worry so much about feeding in the 2 hours prior to pmps tonight, just know that he might be a tad bit higher because you've fed. If I've understood correctly.
I think what Marje is saying is that when you've got a string of green numbers like this and don't know what will happen in the next cycle after you shoot, it might be a good idea to skip the pm shot if you can't monitor.
One technique many of us with high dose kitties use is to give a 1/2 dose shot after you've had a string of green numbers in order to drain the depot and interrupt the string of low-numbers. Keiko hasn't bounced from hitting the 30's - which is probably telling us that he's become used to fairly low numbers. I think since you can monitor tonight til +4.5, if he were mine, I'd go ahead and give him a 1/2 dose (5.0u) and then make sure to test him at +2 and see where he's going. If he's under 100 at pmps, I might even give less, 3.0u or so, since you can't monitor after +4.5.
The idea is to always err on the side of safety when you know you can't monitor if it's needed.
I would come back tomorrow with a new dose of 10.0u and then stick with it for 6 cycles unless he goes below 50 again.
Serryn's also offering the option of skipping, which is ok to do as well. I'd probably want to get a little bit of insulin in him, but skipping is ok.
As far as shooting early - it's better to save that for when he's high. When you shoot early, as Serryn said, it acts like a dose increase - you're increasing the overlap between one shot wearing off and the next shot onsetting (starting to work) and that can lower numbers. If the kitty is high it can be helpful, but if the kitty is low that can cause problems.
You can see that something's changed with Keiko. Maybe he's got acromegaly and the tumor is producing less hormones. Maybe he's just gotten used to normal numbers and he isn't bouncing. Maybe he has insulin autoantibodies and its run its course and he's going to need less insulin now. Whatever has changed, it's a good thing, but along with it you have to be more vigilant. I know you can't test him all night, so that might mean it's safer for him to be running a little higher.
Does that all make sense?