 They will stay away for about two weeks, and then they realize, well, that doesn't bother me that much anymore, so I'll give her a spray of a different kind, and that's all you can do. I was thinking about maybe putting a bunch of cayenne pepper on one of them and just hoping that helps. Well, yeah, sometimes if they do have a mucous membrane, it should deter them a little while. That's how I got the dog to stop chewing on the couch. Yeah.