Summer Games Electrolye Supplement For Horses by Kentucky Performance Prod. $16.40. Summer Games is a dietary electrolyte and trace mineral supplement for performance horses. To use, Mix Summer Games Electrolyte with Daily Grain Ration. Product contains Salt, Potassium Chloride, Dicalcium Phosphate, Magnesium Oxide, Dextrose, Iron Proteinate, Zinc Proteinate, Copper Proteinate, Manganese Proteinate, Natural and Artificial Flavors, and Yellow Fd&C #6 Aluminum Lake.