[IcE-CooN]

I have Slight different opinion,

Before bring home a new cat, I suggest you do a blood test of FIV , FELV & FIP is necessary on your existing cat and your new cat. Coz you don't want to bring in a new cat where the new cat will bring diseases that kill your existing cat

1st Stage, Put the New cat in a Room (IF YOU HAVE A SPARE ONE) for at least 1 - 2 Month. Until you are sure of your new cat are free from any problem FIV,FELV,FIP & FLEA, FUNGUS and etc etc.

2nd Stage, I am sure the Existing will be able to smell the new cat present in the house, Make sure you put some cloth in the room for the new cat to sleep. Bring the cloth out, I am sure the existing cat will try to smell and let it get familiar before seeing the real cat. Then Put the new cat in a Bigger cage. (Remember don’t cage the existing cat that is not right you will make your existing cat feel he/she been abandon). Daily let the new cat out for a walk for few hours, but make sure the existing cat in some room where they are not able to TEAR each other apart.

3rd Stage, When both of the cat able to smell each other face to face with the barrier of cage then is a good sign to let them mix together. If not stay at 2nd stage, and make sure don’t rush into 1st stage.

Well is up to you , but this is how I introduce new cat to my family and it works for me all the time and I have more then 10 cats at home now.