The other cat, Dèca, will eat the sour cream from a bowl, a person feeding her with their finger, or off the counter or floor.
Mr. Spoiled Rotten just refuses to feed himself sour cream. And, since I am the one who did such a good job spoiling him, I go in and hand feed him the sour cream.
See? http://www.flickr.com/photos/27983313@N05/sets/72157623727697716/
How do you like that? (Interrupts my knitting!!!!!)