(Essential Show Feeds) Essential Express O is a concentrated muscle builder designed to put muscle on the top, hindquarters, and chest of show livestock. For best results, use for 45-60 days prior to show. Express O can be used on show livestock without the fear of structural damage, such as tight tendons, stiffness, or hoof cracking. Express O may be fed to cattle, swine, sheep, and goats. Pump dispenser provides approximately 1.5 cc per pump. Liquid.