It's probably not something your large breed dog thinks about, but his SMARTBLEND is working around the clock. It starts with a dual defense antioxidant blend of Vitamins E & A along with minerals zinc and selenium in a 100% complete diet. Together, they make a healthy difference on the inside by supporting your dog's strong immune system and on the outside by supporting healthy skin and a radiant coat. | Purina ONE Smart Blend Large Breed Adult Formula Dry Dog Food | Size 31.1 lbs