Well, I took a good long look at Hidey's SS. I see that you are feeding some good foods, and keeping great notes on that in the remarks column. Thanks so much for doing that. I reviewed the food choices and they all look good to me.
Yes, I see that Hidey's BG readings are creeping up a bit, with a couple of readings in the 130's. My suggestion would be to keep a close eye on him and just like we suggest in the OTJ trial instructions, if the BG reading is in the blue range, >99 on a human glucometer, then you want to test at +3 or +4 hours to see that the BG level is going back down after the food has been processed. This lets us know that Hidey's body is producing some insulin on it's own. I do see those drops with a couple of tests you have done in the +3 - +4 timeframe, so it does look like his body is producing some insulin to help him out.
He's reminding me a bit of my Wink, on his first OTJ trial. His numbers crept up and I got uncomfortable with the higher numbers so I put him back on a tiny dose, 0.1U for a bit. Turned out, he was getting another of his UTI's and had a bout of diarrhea which seemed to be the cause of the bump in BG readings for my Wink.
There is a possibility that an infection or inflammation of some sort, maybe hidden like teeth, could be affecting the BG readings. I think that is much more likely than the food you are feeding. You are there with Hidey. Any possibilities of infection/inflammation going on?
How about added stress? Changes in the household such as a new cat, even a neighbors cat that causes Hidey to get his hackles up could be a possibility. Have you changed your daily routines? Cats hate change and can get stressed from that and stress can raise the BG levels.
So, 2 choices for you as I have said.
1. Keep a close eye on the BG levels and test around +3 to +4 to see if the BG levels are down after food.
2. Put Hidey back on a tiny dose of insulin, maybe 0.1u of the Prozinc.
My recommendation is for #1.