The Missing Link’s Original formulas have a fresh new look and added ingredients to help pets live their best lives ever. The Original patented manufacturing technology and proprietary blends of ingredients are designed to increase bioavailability and performance. LactoSpore Probiotics have been added to all of the formulas to boost absorption, making it easier for pets to utilize the nutrients. The line includes Hip & Joint, Senior, Puppy, Digestion and Skin & Coat.