Dr. Worth has 3 tips for you on how to feed your horse on a budget: feed your hay in a net or bucket so it doesn't get trampled by your horse, feed your horse grains only if necessary, and finally look for generic nutrients such as feeding whole flax seed rather than expensive oil supplements.
Horses require both macro and micro minerals to maintain their health. The best way to feed this is using a mineral balance pellet or supplement, like LinPro instead of feeding a mineral block.
Treats are useful for R+ training and rewarding your horse in general. However, treats can be very expensive. Dr. Worth offers some inexpensive horse treat alternatives.
Dr. Worth discusses Quiessence, the popular magnesium chromium supplement for horses that provides magnesium in two different forms- as magnesium oxide and as magnesium protonate for maximum GI intake.