I have all sorts of aggression issue with my four females. I have used the Feliway before and wasnt' sure the first time if it was really working. However, recently Deirdre was becoming more upset and irritated with the other cats all the time. She just seemed so tense. Always walking around growling and hissing at the others. So I bought another refill for the plug in. Within 12 hours she was calmer and over the weekend she was feeling much better I think.

Denyce