I'm personally using the normal Repashy CGD with mine. I got them to eat it by first offering peach babyfood, which they dove into enthusiastically. The I mixed half babyfood and half CGD--they loved that even more. After they were used to that, I reduced the babyfood until I wasn't using any of it at all, and they now eat straight CGD and love it.
At this point, I can put anything in that bowl, and they'll eat it...Clark's CGD, Repashy Mango 2 part CGD, whatever. lol.