Your giant puppy has big nutritional needs. Giant breed dogs have the longest growth period out of other sized dogs—that's why Royal Canin growth formulas for giant-sized dogs come in two stages: Giant Puppy and Giant Junior. Royal Canin Giant Junior Dry Dog Food is a nutrient-dense diet formulated for that second stage of growth. An adapted protein content supports muscle development. A combination of prebiotics and highly digestible proteins helps promote a healthy balance of intestinal bacteria for digestive health. And clinically proven antioxidants, including vitamins E and C, support the healthy development of immune systems. Depending on your giant dog's development, keep them on this dry puppy dog food until 18-24 months. Then switch to Royal Canin Giant Adult Dry Dog Food for continued tailored nutrition. With over 50 years of scientific research and observation, Royal Canin continues to deliver targeted nutrition to feed every pet's magnificence. Not satisfied? Then neither are we. Our formulas are 100% satisfaction guaranteed. (Just contact us for more details.)