Add 2 to 4 capfuls to 2 gallons of water for ready-to-use shampoo. Wet horse thoroughly. Massage Vetrolin® White 'N Brite™ Shampoo into horse's coat, mane and tail and leave on for 5 minutes. Rinse well with clear running water. TO SPOT CLEAN: Rub Vetrolin® White 'N Brite™ Shampoo directly onto stain. Leave on for 5 minutes, then rinse thoroughly.