Milk Fever

Milk fever ahead of autumn calving: 100–120g of minerals a day and low-potassium silage

Older, over-conditioned cows are most at risk of the calcium crash that follows calving; the advice is a dry-cow mineral with 22% magnesium and high vitamin D, trace minerals from six weeks out, silage under 2.2% potassium and a calcium bolus rather than a bottle.