At 4 months old, a kitten's growth rate changes with rising energy levels to support growing bones and muscles. Royal Canin Kitten contains an adapted level of protein, vitamins, and minerals for kittens aged 4 - 12 months. A combination of prebiotics & highly digestible proteins helps promote a healthy balance of intestinal microbiota for digestive health. Prebiotics & highly digestible proteins help promote a healthy balance of intestinal microbiota for digestive health. Clinically proven antioxidants, including vitamins E & C, support the development of a healthy immune system.