What is Tonisity Px? A breakthrough technology to help pigs thrive as they transition through key milestones. It is an isotonic, highly palatable liquid solution that pigs will drink voluntarily, as early as Day 2 of life. THE FIRST 10 DAYS are the most important to set a little pig's small intestine up for a lifetime of success. Tonisity Px fed to pigs in farrowing Days 2-8, targets small intestine cell development and studies with more than 100,000 pigs have demonstrated Px aids in the survivability of piglets. With a taste profile pigs crave, Px provides the intestinal support and hydration needed to get them off to a fast, healthy start.