CBC returned nothing out of the ordinary. Guess that's sort of good news and bad news all rolled into one. Suggests that there's not an infection to treat (good), but not a course of action (bad).
He's still tired-looking. Not interested in wheeling. Not steady on his feet. He moves his kibbles out of his dish to hidey spots, but doesn't eat them. Instead, he eats syringed food with gusto. And snuggles like a champ.
So... idea is maybe we're looking at something like a pancreatic tumor that's messing with blood sugar. Least invasive way to address: give him a little sugar this evening and see what that does for him - like a bit of honey. They can also do blood tests... my little pincushion!! Steroids may be a possibility. And there's the option of doing exploratory surgery to see if they can see something awry.
I'm going with "let's say this is a blood sugar thing, give him sugar" for this evening. And then will be in touch with the vet about how that goes. Quills crossed!!