Unique oral calcium supplement features a triple combination of calcium propionate, calcium chloride and calcium carbonate providing rapid release (less than 30 min) and sustained increase of blood serum calcium levels in freshening dairy cows. Does not heat up during calcium release. Each bolus contains 44 gms calcium, more available calcium per bolus than leading calcium boluses. Dosage: Supportive - 1 bolus prior to or immediately after calving; repeat 6-12 hrs after calving; Preventive - 1 bolus 2-6 hrs prior to calving; repeat 6-12 hrs after calving. Stable at all storage temperatures. Patent pending.