I feed 38 community cats in my town. Several months ago we rescued a beautiful cat from one of our colonies who did not belong there. After attempting to find his owner, brought him to Rescue League and found out he was already neutered,he was given a microchip and shots, I agreed to foster him in spite of my very aggressive cat. Your diffuser was recommended and, IT WORKED!!! I decided to keep the rescue cat. Thank you for a wonderful product.