Fevertreat Bolus

Contains calcium with three types of release mechanism: fast, medium and slow release specifically formulated for fresh cows.


Cattle approaching calving or right after calving are at high risk of hypocalcemia. Besides the high calcium demand of fetus before calving, initiation of lactation and continued milk production creates an extra burden for calcium blood level. Calcium deposit increases two to three fold right after calving which leads to the drop of calcium concentration in blood below a critical threshold. If not treated soon enough or of sufficient magnitude, clinical and subclinical hypoclacemia may result. In severe cases, calcium deficiency may lead to the elimination of animals.


Field data shows that per each clinical hypocalcemia in the herd, there are several subclinical hypocalcemias. Subclinical hypocalcemia, more common in dairy herds, is not readily detectable. A shortage of calcium can result in tremors, eventual collapse and potentially death. Until recently, strategies developed to answer hypocalcemia before and right after calving had failed to maintain a constant level of calcium in the blood.


Calcium bolus with three type of release mechanism appropriately resolves the situation. Application of calcium bolus significantly reduces the risk of milk fever and consequent metabolic diseases. In addition, to overcome the upper respiratory system problems caused by drinking calcium supplements, a cover is designed for the bolus that prevents it from dissolving in the mouth. The cover dissolves and opens only in the rumen environment and allows continuous release of calcium for 48 hours after application.






  • Wax coating (release cover) that prevents release of calcium in the mouth and the consequent damages to the upper respiratory system


  • Rapid and continuous release of calcium only in the rumen environment that maintains calcium blood level for 24 to 48 hours


  • Two boluses with a diameter of 2.5 cm and length of 10 cm contain 62 grams pure calcium, which gradually provides calcium


  • Consumption of this bolus maintains the proper level of Calcium in the blood for 24 to 48 hours.


Pure calcium per bolus
  Fast release Calcium 23 gram  
  Medium release Calcium 4.5 gram  
  slow release Calcium 3.5 gram  
  Total pure calcium 31 gram  







Application instruction


Consumption of bolus for dairy cows without a history of milk fever


With the first sign of calving, one bolus should be fed to provide a good blood calcium level for 24 hours.


Consumption of bolus for high-risk dairy cows or a history of milk fever


With the first sign of calving, the first bolus should be fed. 12 to 24 hours after the first bolus, the second bolus is fed. In this case, the proper level of Calcium maintains for 48 hours.


Consumption of blues for cows with milk fever


Based on the herd veterinarian advice, after injecting calcium supplements and stabilization of the cow and ensuring that the animal swallows normally, the first bolus should be fed to the cow. The second bolus should be taken in 12 to 24 hours after taking the first one.




  • Bolus should be stored in a cool and dry place with temperature below 25 ° C.
  • If you see clinical signs of milk fever (disability), do not feed bolus, because in this case, the animal has difficulty swallowing and there would be a risk of suffocation.
  • Use only bolus-injecting tool to feed the bolus.