Thanks to everyone for sharing their thoughts. Purely coincidentally, not synchronistically, I think, Otto's vet recommended I take him to the NCSU Vet School this morning for an ultrasound rather than to wait a week for the clinic's visiting ultrasound person to return. I never get out of the place for much less than five hundred bucks, usually more than double. :( Otto has been off his feed, not quite himself, and some of his blood work values (consequently, or for the same reasons?) are noticeably off. Liver, kidney and pancreas assessment is the goal. We shall see what we shall see. As usual, I feel sorry for the 4th year vet student who will be expected to read his 1-1/2" thick chart upon intake.
Jingles and fingers crossed for your kitty. Hoping for a happy update!