Thank everyone for the best wishes for Clarence. The vet couldn't find anything that shouldn't be there so we'll repeat the blood test next month - hopefully it is just that Clarence's blood levels are on the low end of normal and that's just his range. If they're stable, we're good but if they've dropped next month, we're not so good... but we'll deal with that next month if we have to.
The sedative knocked him around a bit and he was way out of it all last night. Thankfully he was back to normal this morning so all is good!
Despite all the doggy-drama last night, I did manage to get some stitching done. I've filled in a little more of the last ornament...