Garlic has a lot of health benefits for people but it can also benefit some animals such as horses because of the vitamins minerals that it has in it. If you have a horse it is perfectly acceptable to feed them a moderate amount of garlic powder. Garlic has been known to help with things from high cholesterol to high blood pressure and gout.
You will want to put a bit of garlic powder in with the food that they regularly eat so they will be able to get what they need to stay as healthy as possible. There is no doubt that garlic is good for both people and some animals because it has anti-fungal and anti-inflammatory properties along with essential vitamins and nutrients.