Do people also feed a lot of fat to stallions? I read a lot of positive things in articles about fat. Are there no negatives to feeding fat?
http://jas.fass.org/cgi/reprint/74/6/1252.pdf
Because I also read the following:
Dietary fat and vitamin E - what's the connection?
In the last five or ten years, we've become increasingly aware of the importance of fat in the equine diet. Fat is an excellent, easily-digested source of energy, and many horses are now consuming diets that are quite high in fat. Something we may not have thought enough about is the fact that any diet high in unsaturated fat is going to increase the body's requirements for vitamin E. There's nothing wrong with feeding fat to horses, whether it's to help the digestion of an old horse or to "shine up" the coat of a show animal, but it IS important to realize that with every increase in fat there should be an increase in the animal's consumption of vitamin E.
Which vitamin E? Does it matter?
And while we're on the subject of this vitamin - let's talk for a moment about natural vitamins vs synthetic ones. For some vitamins, it doesn't matter - the natural and synthetic versions are identical, and both the natural and the synthetic versions work the same way. Unfortunately this is not true of vitamin E - the natural and synthetic versions are NOT the same. Some natural molecules are produced in two forms that are mirror images of each other, and the body is very particular about which form it accepts.
We can't synthesize an equivalent version of the vitamin E molecule - we're just not that sophisticated yet! The synthetic "d-l" version is NOT a duplicate of the natural "d" version. In the case of vitamin E molecules, only the natural version will actually "fit" the body's receptors. This is why the natural version has been shown to remain in the body longer and why it gets distributed to the tissues more effectively. The "d-l" version is going to be roughly half as effective as the "d" version - IF that.
Natural vitamin E is more biologically active than its synthetic counterpart, and may be as much as twice as bio-available. This is why many doctors and veterinarians are recommending that their patients take the natural vitamin E rather than the synthetic version.
Read your labels carefully! There's a one-letter difference between the natural and the synthetic, very easy to miss if your eyesight is poor or if you are in a hurry. The label on the natural vitamin E will begin with "d" (e.g., d-alpha-tocopherol), whereas the synthetic one will begin with "dl" (e.g., dl-alpha-tocopherol). It's easy to make a mistake.
Probably the best way to feed the supplement will be to purchase the natural vitamin E in capsules and add the vitamin to your horse's daily feed by piercing the capsules and squeezing the oil onto the horse's grain. There was a time when horseowners who wanted to feed additional vitamin E would buy gallons of wheat germ oil and add that to their horses' diets, but this isn't always successful. The oil, like any other oil, can go rancid rather quickly, at which point it is useless as well as unpalatable. It doesn't take long for the active vitamin E to disappear from wheat germ oil, and I wouldn't recommend it as a reliable source of vitamin E. Again, ask your vet - he may know of a source for small amounts of fresh wheat germ oil. Whatever kind of oil you are feeding, be sure that it is FRESH. Rancid oil, even slightly rancid oil, can really use up all of the vitamin E you're feeding the horse... under the circumstances, I'd be tempted to use small containers of cold-pressed oils.