Chemical free chew repellent. Safe & effective. Rosemary & Mint When saying “NO†is not enough! A couple of sprays with this super-sour but super-safe training spray will do the trick. Chemical free, naturally repellent ingredients prevent destructive chewing & gnawing. Suitable for most surfaces indoor & out, including furniture, plastics, garden surrounds & shoes. Most effective when used in conjunction with reward training.