What a story of poor Casper. I can only chime in that some cats will eat Gerber's baby food meat, 2 sitter formula, no additives at all. A fountain might help as well. I have 2 or 3 in the house running all the time and they are used. My two new rescues prefer dry food but will eat a little bit of Fancy Feast Medley and Fancy Feast Savory formulations. They were always offered wet food when they were outside but given the lack of control of who ate what, I think that the dry food was more available.