I just purchased the Feliway Comfort Zone which you plug in an outlet.

I have a cat (Debra) that likes to urinate outside the box and scratch woodwork, so I'm hoping it will create a more relaxed environment for her . . . my other female (Lizette) likes to chase/terrorize her, which only makes matters worse. Debra is a very sensitive cat with many "issues", and why she puts up with Lizette's bullying I guess I'll never understand. Debra is solid, sinewy muscle, and Lizette is much smaller than she . . . Debra can even hold her ground against my massive stud muffin, Schuyler!! I guess it is a female dispute; maybe Lizzy is trying to challenge Debra to become Alpha-girl since Lilly has gone to RB.

I hope the Feliway plug-in has a positive effect as it certainly was expensive enough ($42.00 at PetSmart) and is good for six weeks until you are supposed to replace the container. I don't expect immediate results, but do hope I didn't throw away my money. I had just the spray bottle Feliway and used to spray the areas where Debra was scratching/spraying as per the directions, but it did not deter her.