A kitten eats more food (per pound of weight), but not different food. A kitten needs a high-protein, meat-based diet. An adult cat needs a high-protein, meat-based diet. A senior cat needs a high-protein, meat-based diet. Are there situations when it’s appropriate to adjust the diet based on health issues? Absolutely. But kittens, adult cats, and senior cats all thrive on a large amount of animal-based proteins (meat, organs) and all get much less nutritional support from plant-based proteins.