Abstract: A method for producing butyric acid and/or a butyrate is provided, wherein the method comprises fermenting a saccharide-containing substrate in the presence of a first strain and a second strain, wherein the first strain is a butyric acid bacterium and the second strain is at least one of a homofermentative lactic acid bacterium and a facultative heterofermentative lactic acid bacterium.

Abstract: A method for preparing a feedstuff comprising butyric acid and/or butyrate, comprising: adding a microorganism into a light corn steepwater to provide a mixture, wherein the microorganism comprises a first strain and the first strain is able to metabolize saccharides and/or organic compounds in a fermentation to produce butyric acid; keeping the mixture under an anaerobic atmosphere to conduct the fermentation to provide a fermentation broth; and optionally condensing the fermentation broth. Optionally, the microorganism further comprises a second strain, wherein the second strain is able to fix a carbon oxide.