Thank you all so much for your suggestions, kind words and prayers. PT is full of truly amazing people.

We've decided that as soon as we get the new cat tree (or two) next weekend that Olivia will now be living in our bedroom while we aren't home. She much prefers it anyway and is always in there as it is. Now she'll once again be lounging in her window kitty bed and will have her own food, water and litterbox to herself.

I feel this will work out. I thing we're going to put the screen door up so she'll know she's save, while keeping the others from destroying the carpet.

As far as Phoebe and Samson...I really, really, really want to keep them. They've both stolen our hearts and I just hope things calm down so David doesn't freak out or anything...

My vet is also changing Olivia's food to Science Diet C/D for her urinary crystals she keeps getting. Having her in her own room will really help in making sure she eats that only.

I feel so much better. Thank you all so much for your ideas.