Thanks for the help, guys.
I made up some of that pea and tuna paste, Bo looked at me like I was crazy. You know the look, "you don't really expect me to eat that?!" He did eat another piece of a plain pea, though. But I don't see any green poop, so I don't think that's a good sign. I haven't gotten the daphnia yet, I thought I'd try the tuna first.
Meanwhile, his belly is getting bigger. He's looking very round now. And I do notice him resting more often than he used to.
So, tomorrow I'll be going to get some frozen daphnia. And if that doesn't work... Any other suggestions?
Paul, I meant to tell you I was sorry to hear about Willie. I'm sure he knew you were doing everthing you could to try to help him.