I think I just had a good discussion with the vet.
She looked at his spreadsheet and we discussed how he has been feeling.
I am going to keep him off insulin for now, which is not a stance perhaps everyone here might agree with, I know.
The vet said given his BG numbers, and also the fact that he has gone low several times, and the way he's feeling, she would not recommend insulin at all at this point.
She would like to see him have an exam before we do much else.
I think that's probably the best idea; at 15 there is a lot that could be happening with him.
Monday he is going in for a re-check, a nose to tail exam.
She'll check his heart (he and his bro have heart murmers), feel him all over for lumps, check his thyroid again, check his teeth to see if they're the cause of his not eating.
In the meantime I asked about cerenia (for nausea) or an appetite stimulant which the vet thought was a good idea (thank you
@Wendy&Neko ).
She said we should do one or the other, and how he responds might tell us something for next week.
He had taken cerenia back in 2016, and so I am picking up a box this aft.
He actually just barfed again, around the same time of day he did yesterday when I was not home.
It will be good if the cerenia works.
Fingers and paws crossed he has an okay weekend waiting for his exam.
Thanks everyone for their help and support, just writing this stuff out and knowing someone reads it and understands is helpful.
I know everyone here loves cats regardless.
Laura