B o l u s i n g Annual bolus for the ewes pre tupping! Been using the downland boluses for a few years now and happy with the results we get. The essential boluses release key trace elements like copper, iodine, cobalt, and selenium to improve animal health, performance, and fertility. Benefits include consistent nutrient supply over several months, optimized growth rates, stronger immune systems, and supports ewes through critical periods, all with a simple, single application that minimizes ha