Are there any dangers in using Poly Copper to deepen coat color?
Question: Are there any dangers in using poly copper to deepen by horses coat color. he's black most of the year but brown in the spring. I've heard good and bad about using copper.
Dr. Kellon: Compared to other species, horses are very tolerant of even high levels of trace minerals. The main danger is that you will induce a secondary deficiency of zinc because copper competes with zinc for absorption.