Why You Need High-Mag Minerals in Your Cow Field Now – It’s Grass Tetany Season

It’s Spring!

Oh boy – it is Grass Tetany Season.

If you don’t make it to the end of this post – here’s the net-net:  Get Magnesium in your fields.  Now.  Then end.

lush pasture

I am here to tell you, who knew that grass could make a cow sick?


Are you kidding me?

Eating grass can make a cow sick?

Cows are supposed to eat grass!

All a cow eats is grass.

How on earth can grass make a cow sick?

These, my friends, are great questions.

Yes, eating grass can make a cow sick.

Its true.

Stupid, but true.

How can grass make a cow sick?

When a cow has been on dry hay all winter, and is thrown onto a lush, green, grassy pasture in spring – it is a recipe for disaster.

By disaster, I mean, Grass Tetany.

Here’s the problem.

  1. Hay is dry.
  2. (good) Hay has normal amounts of potassium and magnesium in it.
  3. Fresh, Lush, New, Green grass does not have normal amounts of potassium and magnesium in it.
  4. Fresh, Lush, New, Green grass has too much potassium and not enough magnesium in it.
  5. Green grass, first thing in the morning, on an empty stomach is dangerous territory.

Don’t ask me.

The basic underlying problem is a lack of magnesium.  Really, it’s the high potassium levels in the fresh, rapidly growing grass that is the culprit.  Potassium displaces magnesium.  This means that even if your grass has magnesium in it, because fresh grass is so crazy high in potassium – your cow can’t get enough of the magnesium from the grass because the potassium is kicking the magnesium’s butt.


Signs Your Cow Could have Grass Tetany

“Symptoms of tetany include cows staggering, excitability, involuntary muscle contractions, convulsions, frothing at the mouth, and vocalization.  Tetany can strike quickly, leaving the animal dead within hours of the onset of symptoms, making detection and treatment that much more difficult. In the battle against grass tetany it’s best to try to prevent it rather than treat it.”

-Southern States (source)

Preventing Grass Tetany couldn’t be easier – Magnesium.

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