Re: The deal with Rescue Remedy?
I have not tried any of the three most commonly recommended products; Feliway, Composure Liquid and Rescue Remedy. Several members here, members whom I highly respect, and they have reported amazing results. So, while I haven't used them, I do believe they work.
There is a slight issue with Feliway, regarding the phenomena of some cats not being affected by CatNip, some cats are also not affected by Feliway, though when it does affect the cat it works wonderfully. CL and RR are two products that can be used together and over a period of time, say 2-3 weeks, the cat becomes more mellow, relaxed and tolerant. I know Mitts & Tess (Merry) has had fabulous results with her fosters by using both products and I am having a brain-seize moment and cannot recall the names of other members who have used them.
In general, it does sound as if CL/RR therapy could benefit your 8yr old to help ease the adjustment tensions of accepting the new kitties.
Best of luck!