Size Health Nutrition Giant Junior 15 KGGrowth is an essential stage in your dogs life its the time of big physical changes as well as new discoveries and encounters. During this key period particularly, your puppys diet is important in order to support optimal health as it grows and develops. ROYAL CANIN Giant Junior contains a patented complex of specific antioxidants including the highly beneficial vitamin E to help support your puppys natural defences while theyre still developing.