Selenium

[RALSTON@AESOP.RUTGERS.EDU]

A word of caution on selenium: not all areas
are deficient in selenium! Feeding 8 mg/day to
horses in areas like colorado, wyoming and even pennsylvania
(!) can result in toxicity: loss of mane and tail hair, 
horizontal cracks around the hooves, and, in extreme cases,
sloughing of the lower hoof! It appears that Florida and
Heidi' areas are the most extreme in their deficits. Blood
analysis is notoriously tricky for selenium-be careful!!
Sarah Ralston, VMD, PhD, dACVN