Eukanuba Large Breed Adult Dog Maintenance Chicken 30 lbsLarge dogs are anything but ordinary. And they require extraordinary nutrition to perform their best. Animal proteins, glucosamine, and chondroitin sulfate help keep muscles lean and joints limber and strong. DHA and vitamin E help support healthy brain function to help large dogs stay sharp. Optimal levels of fats and carbohydrates help fuel an active lifestyle. 3D Dental Defense reduces tartar buildup for clean teeth and healthy gums.