Kittens, adult and senior cats all require different amounts of energy in their diets. Adult cats that spend nights out hunting will require more energy than senior cats who spend nights in at home asleep. To make sure that cats gets the right amount of energy, it is important to feed them the correct diet for their lifestage. For example, kittens require almost four times more energy (calories) per kilogram of bodyweight and more protein than an adult cat.