Yes, I recommend Feliway. You can by the plug-in or you can buy a bottle of spray. If you are deligent about spraying regularly save the money and just by the spray but if you think you will forget then I recommend the plug-ins. I use both but often forget to use the spray.

It has helped Ripley deal with all the new kitties we have introduced over the past three years. He was an only cat for 10 1/2 years so bringing in Jazz in 2002, Scout in 2003 and now R&R in 2004 has been stressful for everyone. I have noticed that when the plug ins are going everyone is much more mellow and less fighting. Right now I'm not using any but need to since Ripley has been sick.

I've been buying mine here pfd since they have free shipping but I just noticed the price has gone up so I will try this place feliway that rosethecopycat recommended in sirrahbed's thread.