Purina Pro Plan Joint Health Large Breed Dog Food Chicken & Rice FormulaHigh quality protein, including chicken as the first ingredient. EPA, an omega 3 fatty acid, and glucosamine help support joint health and mobility. High level of protein, combined with proper exercise, helps promote muscle conditioning 26% protein and 12% fat help maintain an ideal weight and body condition. Natural prebiotic fiber, sourced from wheat bran, helps promote digestive health.