Direct fed microbial supplements help reestablish and maintain intestinal health naturally. Contain prebiotics (live, viable, naturally occurring microorganisms), selectively fermented carbohydrates that can help stabilize healthy microflora populations during stress and assist with digestion. Powder formula contains guaranteed min 0.1 billion CFU saccharomyces yeast to help support healthy gut flora and maintain appetite. Helps protect against long-term imbalances, such as new diet or continuous antibiotic use. Dosage: under 600 lbs - 1/2 scoop; 600-1,200 lbs - 1 scoop; over 1,200 lbs - 1-1/2 scoops. Scoop = 10 gms. Paste formula contains two species saccharomyces yeast equal to guaranteed min 0.4 billion CFU to help reestablish healthy microflora balance after disturbance. Studies show severity and duration of diarrhea were significantly less with this combination of yeast. Dosage: 5 ml once daily for 6 days or as needed. Both formulas can be used continuously for ongoing support or as needed. For all classes of horses. 600 gms = 60 day supply.