Thanks for the info! Her tank is 36" x 24". The sides are already covered and there isn't a whole lot of open space. I made sure it was somewhat cluttered when I moved her from the tiny enclosure she was previously housed in. She is in a spare bedroom that is closed off to our cats so it's quiet. We also have a blackout curtain across one of the windows to keep it a little darker for her. I've had her for a little over a year, and after allowing her about a month to adjust to being in a new place with new smells she was moved to this setup and has been there ever since. She looks healthy, hasn't lost any weight, and is behaving as she normally does. I'm sure she's just on a hunger strike, but I wanted other opinions from those more experienced than me before I assumed that's what was going on.