) Recommended for the vaccination of healthy, susceptible swine 3 weeks of age or older as an aid in the prevention and control of porcine proliferative enteropathy (ileitis) caused by Lawsonia intracellularis. Administer 1 dose per pig in the drinking water, for pigs 3 weeks of age or older (not for use in breeding animals). Do not use concurrently with antibiotics or in chlorinated water. To neutralize chlorine, pre-treat lines with Ready Pak DT. Non-frozen, but requires mixing.