I finally got Nala and Dolly to eat off the same plate. It took a few cans of Fancy Feast (the only wet cat food Nala will eat), and about two weeks of servings in progressively closer proximity. Food seems to be only thing that will get them both to brush whiskers without conflict. Even if one cat simply walks by the other, there’ll be a paw swipe or two. I doubt that they’ll ever completely get along. Neither cat seems to be compatible with other cats, even after getting accustomed to each others scents.