Sejin Cheong is a first-year Ph.D. student in Graduate Group in Epidemiology (GGE) and a Graduate Student Researcher in Dr. Alda Pires’ lab (Urban Agriculture and Food Safety Laboratory) at the University of California, Davis. Sejin received a 2020 Association for Veterinary Epidemiology and Preventive Medicine (AVEPM) student award at the Conference of Research Workers in Animal Disease (CRWAD) (https://crwad2020.preseria.com/home), which was held virtually on December 4-8, 2020. Sejin presented “Survey of management and animal health practices on organic dairy herds in California,” a study on the husbandry practices and animal health care status of organic dairy farms in California with survey results ranging from November 2018 to July 2019. California is one of the biggest organic dairy producers in the US. Since recent guidelines for organic certification of dairy livestock (USDA) prohibit the use of synthetic substances in cattle feed as well as drug use in the absence of illness, the guidelines highlight the importance of preventive management. The survey results show that preventive methods such as vaccinations and use of supplements (Iodine products, Selenium, Vitamin A, D, and E) were being used in most of the participating farms. However, mastitis, respiratory and digestive diseases were still frequent, with some disease frequencies being correlated to age, even in vaccinated cows. The questionnaire also included pasture and housing management practices, and education level of workers on the farms. The results of this survey provide direction on where we should place efforts for effective preventive management of organic dairy herds in California.