Equine Yeast Culture Horse Digestive Supplement Yea-Sacc&reg; 1026 -- One Month Trial Size Viable Yeast Culture, Direct Fed Microbial (DFM) Reduces possibility of digestive related colic, laminitis, and diarrhea Stabilizes gut pH which stimulates increase in good bacteria aids in removing lactic acid 2 pounds feeds 1 horse 1 month...Cost 16 cents per serving Container & Scoop not included.