Originally Posted by BarrelBasher
Before you start on the oil, be sure that you are getting the horse enough nutrients including protein, copper, zinc and vitamin A. They are the top nutrients in putting a healthy, shiny coat on a horse.
For the oil, liquid oils are easy to mix in feed, and almost all of the oils with have a good impact on a horses' coat. Its a plus if they can be fortified with omega fatty acids. Coconut oil and rice bran have good omega fatty acids work well. And depending on what coat color your horse has, some oils, like molasses are pretty well known to darken coats. For example, will make palominos and duns go to more of a 'smutty' coat. But I would be sure that you don't feed molasses to a horse with laminitis or that have foundered before checking with your vet. Personally, flax seed oil is my favorite.
Just wanted to clear up a few things here-
In terms of omega fatty acids, coconut oil has virtually none; it is mostly made up of saturated fats. That's not to say it's a bad oil to feed, just that you shouldn't feed it for omega fatty acid content. Rice bran oil has a lot of omega-6 and omega-9, but not a lot of omega-3. Flaxseed oil is by far the best in terms of omega-3 content and ratio of omega-3:omega-6 (it has a ratio of 1:0.2), but is fairly expensive to feed in the quantities horses need to get any benefit from it. Canola oil has a omega-3:omega-6 ratio of 1:2.1, and is the best balanced oil that is also common/economical.
Molasses is not an oil at all. It is about 75% sugar and has zero fat content of any kind.