) Aids in the relief of minor muscular aches, joint pains and in reducing fever. Also aids in the relief of inflammation and pain associated with arthritis. Pure aspirin powder blended in a sweet, molasses-flavored base for palatability. 14,100 mg aspirin per oz. For mature horses, top dress 4-8 tablespoons (approx 2-4 oz.) onto feed 2-3 times daily.