Crystalyx Pre-Calver 22.5kgCrystalyx Pre Calver is perfect for feeding to both dairy and beef cows during the dry period, as it provides a low calcium high magnesium diet which greatly reduces the risk of milk fever and slow calving. The increased levels of magnesium contained in Crystalyx Pre Calver helps improve muscle tone. Inadequate levels can lead to slow calving syndrome where calving can be difficult and prolonged. Dry Cow Feeding: Many dry cows receive no special