Opti Mag - Each Bolus will supply 100g of magnesium over a four week period. Use 1 or 2 boli per animal. For use in adult cattle as an aid in the maintenance of magnesium intake during the high risk periods associated with the grazing of rapidly growing grass, by the provision of a slow release depot of magnesium. Dosage: 2 boluses to be given 2-3 days prior
