title: 16s rRNA-seq of gut content: yellow broilers cecum
design: The abuse of antibiotics brings a series of problems, thus there is a need to develop alternatives to antibiotics with safe nutritional feed derivatives, such as Bacillus coagulans and yeast culture, which have been reported to promote intestinal health, enhance growth performance, and potentially increase meat or egg production in birds. In theory, the combined fermentation of the two has better effect than single. In this study, we conducted to assess the effect of Bacillus coagulans and yeast culture combined fermentation culture (BcYc) on growth performance, plasma biochemical indexes, antioxidant capacity, intestinal morphology, and the gut microbiota in the cecum of yellow-feathered broilers, aiming to provide a theoretical basis for a basis for BcYc application in production of broilers.