Your link to the recipes failed so no one can see the recipes you are referring to.I previously fed my two kittens Dr. Piersons grinded diet. But I heard with a sufficient enough variety supplements shouldn't be necessary. What are your thoughts on the two recipes below?
But common sense provides the answer to the variety question in my opinion. Lets say you do feed a wide variety, or what ever you consider to be a wide variety since it is a vague specification. The theory is that if one of the ingredients is deficient in a particular nutrient one of the other ingredients will contain an excess of that nutrient and will offset the deficit in the other ingredient. But what is to that everything you feed isn't deficient in the same nutrient? That would result in the entire diet being deficient in that nutrient despite the variety.