DetailsStress-Dex® is a balanced electrolyte powder supplement for use as a supplemental source of energy and of calcium, phosphorus, salt and potassium. Can be top-dressed on the horse's grain or added to water. If mixing electrolytes with water, be sure to allow an alternative source of fresh water. Replenishes electrolytes lost during periods of stress, illness, physical exercise, or hot and humid weather. For all classes of horses and dogs.