"We have a one year old cat (choco) that was always a little bratty, but we still love him more than anything. He is a boy, but when we got our new kitten (pesto) he wouldnt accept her. We thought getting a girl kitty would help them get along but they both fight until choco makes pesto meow and we have to separate them. We decided to try the feliway diffuser, and we noticed choco mellowed out a lot. Now choco doesnt bother pesto. This is definitely a product thats worth trying."