Toxic dose of mineral probably killed 21 horses, Florida agency says April 28, 2009— -- An overdose of the mineral selenium probably caused the deaths of 21 polo horses at the U.S. Open Polo ...

Selenium deficiency is a common condition among goats, horses and other domesticated ... If an animal gets too much, they can wind up with selenium toxicity, which can cause neurological disease ...

Horses typically require 0.1mg/kg selenium in the total diet when inactive ... At the other end of the spectrum, the first signs of toxicity are poor hoof quality and pain around the coronet ...

In horses, this disorder in its severe form is shown by the loss of hair from mane and tail, with alteration in the growth, and eventually loss, of hooves. Horses affected in this way ‘go down ...

Local horses had no such problems they had learned ... it is poisonous in overdose. Selenium toxicity is extremely rare but includes loss of hair, nails and teeth, dermatitis, gastroenteritis ...

In severe cases, selenium toxicity can result in organ failure and death. These conflicting results may be due to the different forms of selenium each study tested, as well as differences in ...