Optimag Bolus applicator


Opti-mag magnesium bullets are targeted at preventing hypomagnesaemia (grass tetany) in cows. They should be administered before the major risk periods of grass tetany. These risk periods include after calving when cows are grazing lush early spring grass.

Use a suitable dosing gun to put 2 boluses into the back of the mouth at the same time. Take care during administration to avoid injury to the mouth and pharynx. Always ensure the animal swallows the boluses. Only to be given to cattle at least 300kg bodyweight.

SKU: 132350-1 Categories: , , ,


Optimag bolus applicator is suitable for use with the optimag boluses.

Additional information

Dosage and admin

Two Opti-Mag boluses should be given to each animal two or three days before the expected period of risk, e.g. before transfer from indoors to grass in the spring. If necessary repeat no later than four weeks.

1 bolus delivers 3g per day

Only to be given to cattle of at least 300 kg bodyweight. Administer orally by using the specially designed bolus gun. Load the gun by inserting the bolus into the open end. Open the animal's mouth and the gun should then be introduced carefully and gently until the bolus is in the region of the back of the tongue. Severe pressure on the tongue should be avoided. Depression of the plunger will deliver the bolus onto the rear part of the tongue, thereby initiating a swallowing action. The gun should then be carefully withdrawn from the mouth. A second bolus should then be administered following the same procedure.
Observe each animal for a short time after administration to ensure that the boli have not been regurgitated.


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