At least there is some good change. This was in an email from my GF this morning:

Also, regarding George, he now has some greenies for his teeth and the tartar drops in his drinking water. I also bought some Now food which we have mixed into his canned food, and he really seems to be doing better than before - more energy for sure.
ETA: "Now" is a Canadian-made grain free dry food. My guys get it - the senior weight management formula.

I suggested to my GF that after a month or so of the Greenies and tartar drops, George might be able to handle some dry on its own. It's NOT as good as a dental, I know - but George is doing better, and that is hopeful.