Originally posted by jazzcat
I left Rocky and Rumor totally alone with the big guys on the 12th day. They had been around the big guys quite a bit by that time so hubby convinced me to leave them all out together for what I thought would be 3-4 hours and it ended up being 9-10 hours but they all did fine.

You just have to wait until you feel sure that there will be no harmful fighting. Now the main things I worry about when I leave are Rumor chewing on an electrical cord - she's a big time chewer - or Ripley getting upset and spraying in the house.
I hope and pray that there will NEVER be any serious fighting! Since Josie has never ever been around another cat since she was Brodie's age, I worry about what she'll do. She's pretty aggressive . . . but I'm hoping that she'll have some instincts kick in!

Thanks everyone for your advice. Sounds like I should just play it by ear!