The high magnesium block for cattle and sheep. Use as an aid in the prevention of hypomagnesaemia (grass staggers). For suckler cows, dairy cows ewes after lambing and whenever stock are at risk from grass staggers. Sheep: Offer ad lib, free-access 1 block (22.5kg) per 35 head of sheep. Cattle: Offer ad lib, free-access 1 block (22.5kg) per 10 head of cattle.