When I brought Scout home I kept her in the guest room for about a 7-10 days. I didn't let Ripley or Jazz even see her until she had been here about 4 days. Jazz would reach under the door and touch paws with her. Then on the fifth or sixth day I decided to let everyone meet briefly. There was a little hissing but that was about it and I only let her stay out for about 5 mins. From there I started letting her out more and for longer periods of time - always supervised. By day 10 she was staying out all the time.

You never know, Zelda and Izzy may hit it off from the start but don't count on it. Expect some hissing and hopefully no fighting. None of my three cats are buddies. Lets just say for the most part the tolerate each other and between Scout and Ripley it is barely that.

Best of luck and congrats on the new addition. Keep us posted on her progress please.