Because your puppy`s immune system develops gradually, ROYAL CANIN Labrador Retriever Puppy Food contains an exclusive complex of antioxidants – including the essential vitamin E – to help support its natural defences during this time. Thanks to a specially adapted content of energy, protein, calcium and phosphorus, ROYAL CANIN Labrador Retriever Puppy Food contributes to the healthy development of your growing puppy`s bone structure.