At least until I got him to take some cream cheese from my finger. Later he took it from the dish and we got a good bit of cream cheese in him. It may not be a cat's perfect food, but it contains calories, which are important right now.
But, boy, does he have bad breath!
Update: Later in the evening, Bilbo had crawled into the sink to drink from a dish of water that was sitting there, so I'm thinking he's feeling better.