Apples - We use Fuji apples that are high in antioxidants, rich in Vitamin C, and a good source of iron and potassium. Chicken Breast - Our cage-free chickens are raised without added growth hormones or added steroids and provide amino acids for muscle development and maintaining muscle tone. Glucosamine Hydrochloride - Our glucosamine comes from natural sources to help maintain joint mobility. Chondroitin Sulfate - Our chondroitin comes from natural sources to help maintain joint mobility. Vitamin E Supplement - Vitamin E is an essential fat soluble vitamin.