FORMULATED FOR GIANT JUNIOR DOGS: Royal Canin Giant Junior Puppy Dog Food is tailor-made for puppies over 8 months of age and up to 18-24 months with an expected adult weight of over 100 lb MUSCLE DEVELOPMENT STAGE: An adapted protein content helps support muscle development as your large breed dog gains more muscle during their final growth stage MICROBIOME SUPPORT: The combination of prebiotics and highly digestible proteins helps promote a healthy balance of intestinal bacteria for digestive health BONE AND JOINT: An adapted energy intake and balanced mineral content promote healthy bone and joint support IMMUNE SUPPORT: Clinically proven antioxidants, including vitamins E and C, help support the healthy development of your puppy’s immune system