Recommended for increased rate of weight gain in suckling and pastured growing steers for improved feed efficiency and increased rate of weight gain in confined steers and heifers. Do not use in veal calves. Do not use in animals intended for breeding purposes.Ideal fit for extended grazing and or feeding periods, lightweight steer calves on feed, long-fed Holstein steer programs or simply when resources allow for re implanting. Offers both stocker and feedlot producers a long-acting, flexible, convenient implant option with the added benefit of a localized antibacterial coating on every dose. Each dose contains 43.9 mg estradiol and is coated with not less than 0.5 mg of oxytetracycline. One study showed that 1 dose of Encore lasts the entire feeding period, up to 400 days.