She's just lying in the corner of the cage, has been for hours, not doing anything. She looks so sad. She's still drinking, but I haven't seen her go to the food bowl at all. This is most unlike her, she's usually bouncing around, if not, at least wandering around. Could this be because she's possibly pregnant? Or could it be because I sectioned off the top floors of her cage, so now she's depressed/bored? I don't know, should I be worried?