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Grass tetany is an anti-quality factor and a metabolic disease where livestock experience a severe case of magnesium deficiency while on spring pasture. Also known as hypomagnesemic tetany, grass staggers, winter tetany or wheat pature poisoning, it primarily affects older lactating cows that are 2 months into their lactation period (or suckling 2-month old calves) but can also affect young or dry cows and growing calves.

Grass tetany primarily occurs while grass is in its vegetative stage (or succulent immature grass) and after a pasture had been fertilized with lots of nitrogen. Nitrogen will decrease availability of magnesium to cattle, especially with potassium-rich soils, causing a significant decrease in magnesium in the blood serum of cattle.

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Q: What is grass tetany?
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