diet is a key factor influencing the composition and content of gut microbes and is easily controlled and modified. different nutrients in the diet have a large impact on gut microbial composition. this study described a to study of microorganisms in the stomach contents of foal and would be of great interest equine gastrointestinal microbes in field. In this manuscript, we report the results of studies on the microbes in the stomach contents of foals from different sources of grains.