Hmmm Amy I think you should at least cage and quarrantine the new cat... let them get used to each other then only mix them around
don't forget about vacintion and other health check....

__________________
My Life, My Coons, Coons for Life....
[ F.E.I Consortium ] - Felis Wonder Maine Coon (MY) & Enko Cattery (CH) & www.IcE-CooN.com
[Partner Cattery] : Mighty Coon Cattery(MY - KK)
My Friend Blog - (The Truth Blog) : http://www.9livescats.blogspot.com/