Each horse has a unique intestinal microflora, and as such, will have unique needs for different probiotic species. It is difficult to determine which microbial species are most needed for each horse, therefore, the UltraCruz Equine Probiotic Supplement for Horses is formulated to contain a highly concentrated, comprehensive collection of key probiotics and prebiotics to help maintain digestive health in horses and weaned foals. This probiotic supplement contains some of the highest levels available on the equine market of 6 different microbial strains: Enterococcus faecium, lactobacillus acidophilus, lactobacillus casei, lactobacillus plantarum and saccharomyces cerevisiae. Use the horse supplement with horses of all life stages. It's great for maintaining optimal health for your horse.