Yellow to Green Lawn Spray is for Lawns. Do Not Spray Directly on Pets. Tints Pet Urine Spots on Lawns, Instant Natural Green Color. Make yellow spots from pet urine instantly green! Yellow to Green Lawn Spray won’t wash away; in just minutes your yellow spots can be restored to lush green. Reseeding may be necessary depending on the extent of urine burned spots. To prevent yellow spots caused by dog urine feed NaturVet GrassSaver supplement to your dog on a daily basis. Caution: Permanent staining may occur. Avoid overspray on concrete, masonry or any other objects where color is not desired. Accidental overspray may be removed with water prior to drying. Avoid contact with eyes, in case of accidental contact, flush eyes with water. If irritation persists, see a physician.