I used Pet remedy on my old Siamese boy to keep him calm and it worked well. Sadly we lost him and after 5 months decided to get a kitten as his best friend Lexie was pining. All did not go well! Her attitude was ” Don’t want THAT ! want my Leo!” and she chased, yowled at, and bit the kitten and generally hated it. So I got a Pet remedy plug in, which calmed things down no end. Its not on all the time because My husband insists on everything being unplugged at night ! The cats are peaceful overnight but by breakfast Lexie is getting stroppy and irritated. By the time the plug in has warmed things up, she is much more relaxed and calm and remains that way…until my hubby unplugs everything – so we are using the spray in conjunction with the plug in now and things are settling down nicely- and peace has broken out! Thankyou Pet Remedy for an excellent product!