I read that there are two versions of Rescue remedy, one is alcohol based which is fine for humans but not for cats, so be sure to order the pet version. I have a few drops in my water bottle, it does help (mind you this may well be psychosematic, but if the cap fits....)
Rosella, I have had the Pet Rescue plug in going for a week, Tufty is coming in and Theo wants to play. That's enough to convince me of it's properties and will be watching the auction with interest anew.
I could smell it for the first 3-4 hours but not since.