There was a very limited selection of supplements and diets consisted of real, great quality food centered around protein and healthy fats. (fitnessandpower.com)
I know it's not great quality food, but that cats DO love it. (amazon.com)
i've been feeding rc for about 2 yrs now for 4 pitties... one of which is a very VERY picky eater... since feeding the pw, she has not missed a meal... absolutely great quality food with the taste mine can't get enough of. (royalcanin.com)