Question: Is selenium toxic to horses?

Selenium is a trace mineral that is essential for cellular function in the body. Fortunately, large doses of selenium causing acute toxicity and death are uncommon in the horse.

How much selenium is toxic to horses?

In the case of selenium, more can be toxic. The upper safe total intake of selenium per day, based on the most recent National Research Council publication Nutrient Requirements of Horses, is 20 mg for an average 1,000-pound horse.

Can horses eat selenium?

The U.S. Food and Drug Administration has set a daily recommended intake of selenium for an average horse (weighing 1,100 pounds) per day as 3 mg or 0.3 ppm in the diet (ppm stands for parts per million and is equivalent to milligrams per kilogram).

Is selenium dangerous to horses?

Selenium, a mineral that protects cells from damage, can be toxic to horses if given too much in their diet. Those horses suffering from chronic selenium toxicity are diagnosed with alkali disease.

How much selenium do horses need daily?

The FDA recommends an average intake of 3 mg per day for most horses. NRC guidelines suggest that between 2 to 3 mg is ideal to ensure optimal immune function. This is why our Omneity Equine Mineral and Vitamin supplement has been formulated to contain 2.4 mg added selenium.

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What are the signs of selenium toxicity in horses?

The chronic signs of selenium toxicity are characterized by hair loss of the mane and tail, cracking of the hooves, and often signs of lameness, excess salivation, and respiratory failure. Severe overdose of selenium can lead to death.

What horse feed contains selenium?

The selenium in your horse’s diet can come from multiple sources, such as pasture, hay, grain, or commercial feeds and supplements. The level of selenium in hay and grass varies greatly, depending on the area in which it was grown. Testing your hay and pasture is not hard to do and is beneficial on multiple levels.

What foods are high in selenium?

Pork, beef, turkey, chicken, fish, shellfish, and eggs contain high amounts of selenium. Some beans and nuts, especially Brazil nuts, contain selenium.

What are the symptoms of selenium toxicity?

Impacts of Selenium Overexposure

Selenosis symptoms include fatigue and hair and nail damage or loss. Neurotoxic effects can include lethargy, dizziness, motor weakness and burning or prickling in the extremities. There is some evidence for chronic impacts at lower doses including heart disease.

How do you know if your horse needs magnesium?

Signs of Magnesium Deficiency

  1. Nervousness/Excitability/Anxiety.
  2. Unable to relax or focus.
  3. Muscle tremors, spasm, twitching, flinching skin, trembling.
  4. Muscle pain or cramps.
  5. Not tolerant of long periods of work.
  6. Highly sensitive to sound or movement.
  7. Hypersensitive skin.
  8. Irritable moods.

What are the symptoms of vitamin E deficiency in horses?

Symptoms of Vitamin E Deficiency in Horses

  • Gait abnormalities.
  • Dry or damaged coat.
  • Muscle weakness or trembling.
  • Prolonged laying down.
  • Rapid heartrate.
  • General stiffness or lethargy.
  • Loss of muscle mass or condition.
  • Toe dragging.
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