The interactions between animals and the microorganisms that colonize their digestive tracts are of great importance for the characteristics of farm animals. So far, however, little is known about these interactions. With the "Hohenheim Center for Livestock Microbiome Research (HoLMiR)," scientists at the University of Hohenheim from 10 research groups and, in future, 3 junior research groups will work across disciplines to close these gaps in knowledge.