Tried a couple of other sprays before this one which didn't work. We thought our puppy was never going to toilet train. This product was recommended to me and I bought it thinking i was wasting more money. I used it outside and my puppy was doing her toileting in the designated area within two days after she has refused to go outside for over 10 weeks. I felt like crying I was elated. I also only needed about 100mls. Job done. Great product highly recommended.