Horses, like humans, need minerals in order for their body to function properly. Minerals help horses metabolize fats, proteins, carbohydrates, and keep their muscles, nerves and bones functioning properly.
The major minerals horses need are: calcium, magnesium, phosphorus, potassium, sodium, chloride, and sulfur. They also need trace minerals which include: cobalt, copper, iodine, iron, manganese, selenium, and zinc.
Most horses are able to get the minerals they need from good quality hay. However it is most likely that the hay in your area is deficient in some important minerals. It’s best to let your horse have access to free choice minerals at all times or you can contact your vet about a mineral supplementation plan.
(photo taken from horseandman.com )
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