I'm paranoid about my chin's behavior recently

This will be long, so stay with me.

I'm trying to get to the bottom of my chinchilla Mayu's behavior. Just a little background: I've had her for a little over a year and we went through so much together. We were both in a stressful environment and my ex husband yelled a lot. When I finally got out of that house and it was just me and Mayu, I went through a period where I didn't have a chin-proofed room for her to run around in and she started fur chewing. I had no idea how much our living...

I'm paranoid about my chin's behavior recently