WITH the days getting warmer grass is finally beginning to grow (at long last!) but with that so does the incidence of grass tetany for lactating cows. Grass tetany also known as grass staggers, lactation tetany or spring tetany is a metabolic disease caused by a magnesium deficiency usually after grazing lush grass. Magnesium is needed for proper muscle and nerve function so low levels in the blood cause ‘tetanic spasms’ […]