Re: what's next
Eleanor Kellon, VMD
I did answer this privately so sorry if it's a duplicate.
Your vet is correct to test at 7 days. There is no effect of stress on insulin in chronic conditions and the metformin effect won't get any better than it is at 7 days **unless** PPID is helping to drive it, in which case you will need pergolide on board (same for Invokna BTW)
Sugar is best tested when you pull insulin to see the relationship between the two but if you just need a baseline check any time 4+ hours after first meal of the day.
It's not that NSAIDs are entirely useless just that they have minimal effect. What you are seeing could be from him being up and moving around for an hour. Try skipping it to see what happens.
Eleanor in PA