Royal Canin Giant Health Nutrition Adult Dry Dog Food is suitable for adult dogs that weigh 45kg and over and is specially formulated with the nutritional needs of giant dogs like yours in mind. Royal Canin Giant Health Nutrition Adult Dry Dog Food is formulated with an exclusive and balanced complex of antioxidants (such as vitamins A, E, and C) which help to neutralize the effects that free radicals can have on your dog’s cells.