Vaccination programs should follow a continuous, year-round schedule based on local health problems. Vaccination against rhinopneumonitis should be performed at 5, 7, and 9 mo of gestation. Vaccines that require annual boosters should be administered 4–6 wk before the mare’s due date to stimulate the dam to produce antibodies that will be transferred to the foal via the colostrum (see Table: Example of Vaccination Schedule for Broodmares). Detailed information regarding current vaccination recommendations is available at http://www.aaep.org/vaccination_guidelines.htm. Colostrum should be ingested in the first 24 hr of life to effectively provide passive transfer of immunoglobulins.