Nevermind..

remember how I just said I can't get Nixon to stay still? well I was wrong.
after putting Garbo back in the cage I started looking around for Nixon.
normally, I can easily lure her out of her hiding places by shaking a box of pasta or opening the bedroom door, but neither one worked. I started looking for her in her usual corner, but I didn't think she'd be there because I hadn't seen any movement in the corner (the corner is covered in old clothes that we don't know what to do with, so the rats play there)
I found her under Robert's old hoodie, and she was just hanging out there. didn't look like she was in a hurry or anything :D I moved some of the clothes around, and she tried to pull them back to where they were before I moved them, as if she didn't want to be disturbed. it was pretty cute :) after that I just grabbed her and put her back in the cage and gave her a treat, which she thought she could take out of the cage and into her lair. well, by then I had already closed the cage so she had no choice but to eat it there.

well, now I know where to look next time if she appears lost :) and maybe I can let her hang out there like I let Garbo sleep in the bookcase.