Sorry to just get back to you. Sick DH.

Under TR, the no shot number is below 50 if you are using a human meter, 68 for those using a pet meter. Having said that, you hold the syringe, and if he is running lower than you feel safe shooting and leaving, skip. It becomes easier with them when they quit bouncing and flatten out in low blue and green. The likelihood of a big drop is less but that doesn’t mean they
won’t drop from 100 to 40 in a couple hours. Let safety and your availability and ability to test be your guide.
When you say he won’t touch the auto feeder, did you try to train him to it and it scares him? It does take some training. Gracie got it down in two times of putting treats in it and letting it open. Then she tried to pry it open. She was a smart girl. Gracie also used to graze before FD and she was very easy to get on a timed schedule.
If he’s really carb sensitive, yes you can teach him to surf with 0-3% carbs. ECID on carb sensitivity. It just looks to me like he needs just a bit more to slow those drops.
Question: was he dropping quickly before when you tried a 6% food and what happened? Did it shoot him right back up? Or did you give it when he was low and flat and it shot him up? Also remember that when you give food affects the BG. If the kitty is carb sensitive and is flat or it’s later in the cycle (e.g. he’s below 50 and you just want to give him a little bump up), you definitely want to stick with the lower carb food.
Yes, he can earn a reduction by going under 50 once, being in numbers mostly under 100 for a full week, or, if he doesn’t hold reductions well, after he drops between 40 and 50 three times. The other reason you can reduce him is if he’s hovering around 50 and just does not want to come up with HC food, gravy, etc. In other words, if you are having to work really hard for the majority of the cycle to keep him above 50, you might elect to reduce the dose.
Let me know any other questions.