Equine DFM Probitoic and Enzyme Supplement, 5-Pound Contains Amylase, Protease, Phytase, Cellulase, Hemicellulase, Lipase and other digestive enzymes Best for poor digesters, colic candidates, older horses or stressed horses, stallions at stud, pregnant mare, foals & rescue horses 5# pail would last the average horse 80 days