Thank you Teri for your comment. I like that advice very much. Fortunately or unfortunately depending on how you look at it we would be in the same boat if we had gotten it a few weeks ago. He was doing pretty well up until Thursday.
He slept on the couch all day, and I was feeling really lousy that there was nothing I could do. He stood up stiffly and laid back down looking quite miserable. I was contemplating a trip to the eclinic. I thought I'd offer him something to eat, and got out a jar of baby food. That did the trick! he at 90% of the jar so probably a little over two ounces. He groomed himself and decided to get up. I put him on the floor and he moved under the tree. A few minutes later he came out into the kitchen bright eyed and interested in what was going on. I threw down some cookies (dry cat food - currently Nature's Variety), and he ate quite a few. He worked his way downstairs I am assuming to use the litter box, then came back up and went back under the tree.
Eli is currently hanging out with him.