Eukanuba Senior Lamb 1st Ingredient is complete and balanced nutrition for small and medium breed adult dogs over 7 years old weighing up to 54 lbs. Glucosamine and chondroitin sulfate help keep your senior dog's joints and muscles limber. DHA and antioxidants support healthy brain function. This diet is formulated with optimal amount of fats and carbohydrates to help maintain your older dog's energy levels, while Eukanuba 3D DentaDefense reduces tartar buildup to keep their teeth and gums healthy. This diet also provides immune system support to help strengthen your dog's natural defenses.