The Natur-Repel Spray is the same great blend of oils as the Natur-Repel Oil but with the dilution of witch hazel, shake well as it naturally separates and spray away, the oil being much more concentrated is great for deep woods so you will not have to re-apply until your dog swims or you simply can no longer smell it. The scent is very pleasant, the base oil is also Certified Organic which leaves human skin feeling wonderful and soft, especially with the lack of bug bites that you will have! Remember, skin absorbs whatever is put on it meaning healthy or chemical. You can rest assured that Natur-Repel will not be toxic to your dogs' organs..