1st Choice Adult – Medium-large breeds – Chicken formula chicken formula is complete and balanced to meet the specific needs of medium and large breed ADULT DOGS. Since these dogs are more likely to develop joint problems, we have added glucosamine and chondroitin to protect cartilage and joints. Thanks to prebiotic fiber, intestinal transit and stool consistency are optimized. In addition, a carefully selected blend of antioxidants helps reduce inflammation and limit the consequences of early aging and cognitive decline. When offered throughout adult life, this formula is a preventive strategy that strengthens the immune system and promotes overall health!