The invention is directed to a potassium containing preparation or potassium bolus for the prevention or treatment of potassium deficit and optionally other deficit of minerals in ruminants, a process for the production thereof as well as the use thereof. The present invention makes it possible to provide a potassium containing preparation or potassium bolus with a high content of up to 70 wt.-% of potassium salt, based on the total weight of the potassium containing preparation, by adding only a relatively small amount of calcium chloride (15 to 40 wt.-%) and water (10 to 22 wt.-%) to the potassium salt.
