The Equinist: Articles and Commentary by Susan Kauffmann

This is what California Trace does for Obie, who is shown here in his unbathed, unbrushed, au naturel state! Many horse owners are overwhelmed when it comes to choosing a mineral supplement for their horses. Some wonder if their horses really need a supplement at all, while others buy several and throw them all into their horse's feed, figuring that if some is good, more must be better. What should a responsible owner really do? If you are feeding mainly forage (hay and/or pasture), which is truly best for the vast majority of horses, it is more than likely that you do need some kind of mineral supplement. This is because most hays and grass are deficient in several or more key minerals. Depending on your area, these may include copper, zinc, selenium, or calcium. The flip side of this is that many hays contain excessive amounts of other minerals -- most notably iron -- and these can potentially interfere with the body's ability to use the already short supply of copper...