Protein requirements for growing kittens are higher than those for adult cats on maintenance diets. Protein is used not only for muscle tissue synthesis but also for bone and organ development. In kitten products, protein levels are typically several points higher on a dry matter basis than those in adult commercial diets. Kittens should be fed a commercial growth diet several times daily for the first year of life. Free-choice feeding is generally a bad idea because it has been associated with juvenile obesity in your feline pet.