I added three silver dollars tonight, each around a 4" disc. I fed the tank really well before adding them and observed for an hour or so before stepping away. I left the house to take care of a few things and was gone for a few hours. When I got home, one of the silver dollars was missing and the congi had a huge bulge in his stomach. Also appears to have regained some of the color he lost in the recent tank transfer. I didn't think he would go for them because of their shape. Well. Wrong. 
