Highly palatable, feed additive prevents the development of stable flies and house flies in the manure of treated horses. Contains 0.24% diflubenzuron and an insect growth regulator. Dosage: 1 oz per 900-1,100 lb horse per day, top-dressed on the grain or mixed with total ration. Start feeding Equitrol II early in spring before flies appear and continue feeding throughout summer and fall. For optimum control, use in conjuction with premise and on-animal products. 10 lb.