I also give big votes for the Natural Balance and Solid Gold. They're two of my favorite foods to recommend, mostly for the different protein sources, and because Natural Balance is a limited ingredient diet. They were also consistently Lily's favorite foods - Natural Balance was her first favorite, then they switched something about the kibble and while she still liked it, Solid Gold became her favorite then. If I remember right, Solid Gold was the food she was still eating a few kibbles of even when she wasn't feeling good last winter. For a third food, perhaps you could use Chicken Soup? I think they have one with a bit higher fat, I think it's the regular adult kibble. Lily wasn't personally a fan of Chicken Soup, but I've read a lot of other hogs love it. She was just weird!