Given that giant breed dogs can weigh up to 100 kg, it's critical that their diet provide the nutrition required to support their size, joints, and overall health. Because of this, ROYAL CANIN̂® Giant Adult is ideal for adult dogs weighing 45 kg and up. It has been specifically designed to meet the dietary requirements of large dogs, just like yours. Your dog is a large animal, so it is crucial that it gets the right nutrients to support healthy bones and joints so it can adequately support its own weight. For this reason, glucosamine and chondroitin are added to ROYAL CANIN̂® Giant Adult food to help maintain the health of your dog's muscles, cartilage, and bones. It's critical that you control your dog's weight correctly.