Thanks, Steve! The folks at the store probed her, but said they weren't 100% sure. I'll just wait until she's older and healthier, and then try popping her just to make sure.
She's already filled out a good bit. I can't see her ribs anymore and she isn't wrinkly either. Is it odd that she's only defecated once despite having three meals? Or is that to be expected since she was half-starved? I'm feeding her every 5-6 days, and she's hunting with no hesitation at all.