the present invention relates to an isolated anaerobic bacterium bacteroides sp . for use as a fibro - biotic for livestock . more specifically , the fibro - biotic supplements a fiber diet to sus scrofa scrofa with the fibro - biotic improving fiber digestion and decreasing fecal output in these livestock . the present invention also relates to the use of the isolated bacterium as a food composition to improve the health of monogastric livestock and as a feed supplement to livestock .