Most cases of hypomagnesaemia occur in recently-calved beef cows but disease can also occur in dairy cows particularly if not supplemented during the dry period. There is a range of clinical signs from sub-clinical disease to sudden death. Acute hypomagnesaemia is one of the few true veterinary emergencies.
Cattle have no specific control mechanisms for magnesium levels. The concentration of magnesium in the body is a balance between uptake from the gut and losses in the milk and urine. Therefore higher yielding cows are most at risk due to increased losses in milk; older cows have an increased risk too.
Read more in our latest newsletter. This month's edition is written by Will.