SELENIUM

A nonmetallic element. Atomic number 34. Atomic weight 78.96. Selenium is a naturally occurring mineral nutrient which is deficient in nearly all US soil east of the Mississippi, and much of the rest of the nation. Selenium deficiency in horses has been implicated in suspensory ligament soreness, poor hoof growth and quality, and dull haircoat. Cascade, Maryland, farrier Henry Heymering suggests 4mg daily supplemental selenium for horses in selenium poor areas. Frogs discolored yellow are a sign of selenium deficiency.