Fresh Smoked Sardines 5 piece. These huge pieces  offer omega-3s in sardines help prevent canine cancer.They are also known to reduce inflammation and help support a strong immune system.They help maintain brain function and maintain a healthy heart.Simply adding a few sardines to your dog’s regular meals once a week can help develop muscles and other connective tissue, boost their immune system, increase dental health, and protect against kidney disease. 1Sardines are also rich in Vitamin B12, Vitamin D, calcium, and the antioxidant selenium