I have two cats who don’t get along. The younger of the two is very highly stung because he had a difficult past,and can be very aggressive with my elderly cat when he is stressed. We’ve long used the plug-in Pet Remedy which keeps him calm every day, but recently we have been engaged in an international house move involving long periods in transit and major upheaval. We have employed the Pet Remedy spray in this instance to great effect. The cats calm down rapidly when it is sprayed nearby, and haven’t gone off their food or acted up in the way the youngest one would do usually. It’s a great product.