Max is doing a bit better today. He is interested in food at least. He ate some breakfast (about 1/4 can) and then was circling my feet while I made dinner. He had a bit of dinner and is happily grooming himself now. I think he'll go back for more in a few minutes. As far as I can tell, he has kept everything down.
He's still urinating. Not normal volume yet but he's doing okay.
We think that the shot of Metacam knocked him loopy. He was just not himself yesterday and it would explain the nausea and vomitting.
Sue, we decided on Hill's C/D. It absolutely disgusts me but we need to get his pH under control. I have emailed Wysong and will likely get a prescription made for the Struvatrol formula and try that.

Right now, I'm mostly concerned with getting him stable and then we'll worry about the food.