Do you feed her mice at all? Ones you've had to cull, maybe? Where do you get your cages from? The main thing that hold me back from getting more glass cages is the expense.

I get the cages from Freecycle, and craigslist, and yard sales.
I never payed more than ten dollars for a tank. I've gotten some bigger tanks, and traded them for smaller ones before, too.

And yes, she's my 'mouse garbage disposal'.
As well as my opossum, who eats culled pinkies and gerbils.

You do gerbils too? What does the set up for those look like?

You can see the gerbils in the two tanks on the shelf closest to the bird cage.
I don't -really- do gerbils, they just fell into my possesion, and I've been keeping them for a while. They get larger wheels, and more hay, because they shred the hay to BITS in a day. Then I fill half the tank back up with hay, and they shred it again.

They also get huge cardboard tubes that are super duper thick, that came from a camera store. They had some type of film on them. But it's nice, because if I try to give them normal paper towel tubes, or toilet paper tubes, they're gone in minutes!