The sheer size of the extra-large dog commands a presence. But did you know that the giant dog is also at a higher risk of bone and joint issues and frequently suffer from digestive upset? Giant dry dog food formulas have the proper level of calcium, plus includes glucosamine, chondroitin and EPA/DHA for joint health. To help ease digestive upset, Giant formulas include highly digestible proteins and the proper blend of fermentable and non-fermentable fibers.