Application HT 20 - Every ounce of HT 20 delivers 20 mg of biotin, 1,800 mg of methionine, 1,500 mg sulfur, 1,500 mg lysine, plus vitamin B6, silicon, and chelated zinc, copper, manganese and a 6 culture probiotic complex. Administer 2 lb.- 32 days @ 1 oz./day 3.75 lb. - 60 days @ 1 oz./day 8 lb. - 128 days @ 1 oz./day 20 lb. - 320 days @ 1 oz./day Notes Many farriers say HT 20 is the best biotin supplement yet developed; it gets the job done right the first time. Feed one ounce daily. One ounce scoop included.