Problem Introducing New Cat To An Existing Cat Household. Any Advice?

[thinkaboutmoney]

2 Years ago, we purchased a RagDoll Kitten. At that time, we had 2 cats, (both 5 years old). The original 2, never really accepted the new kitten, but over a handful of days, "tolerated" her. After a bit longer, the they continued to accept her for the most part, but still never completely.
My GF and I split. She took the original 2, while I kept the "baby".

Recently I took in the original 2 for a 3 week "babysitting" task, whilst she (GF) entertains a family member who is allergic to cats.

Anyone have some advice on how to help them quickly get along, and reduce stress?

This time around seems much harder for them. After 5 days, the "guests" are still as unhappy as the first day. My cat is fine and is trying to befriend them. She will, however defend herself to a win by chasing the other cats in to submission. She's 5 years younger and has a lot more energy.

 

[puma]

Dear think,

Seems as if you know all about the "alpha" cat deal. Apparently you have been there and done that. There is now "fast track" method of having to deal with this, once again they will figure it out amongst themselves. The "house guests" are stressed and rightly so since they were removed from their original home, moved, and now returned to the original place. Cats HATE change as well you know and the guests are pretty confused and it is going to be harder on them when they get moved again. All you can do is make sure things don't get to rough when a "throw down" occurs. Buckle your seat belt, it's going to be a bumpy rid. Since in the beginning they just tolerated each other and this is probably going to take longer the first time. I hope this is of some help, but I'm pretty sure you know how this will go down.