My two year old snake seems not to be doing well. She stopped eating about 3 or 4 weeks ago, but it was because she was getting ready to shed. She turned blue and shed normally, but then didn't eat at her next feeding. So I waited a week and tried again tonight. I noticed the past week she hasn't been hiding like usual, just sort of laying out in the open. She also seems pretty listless when I pick her up. She didn't even try to eat the mouse tonight - didn't even sniff it really. She looks normal on the outside, no mites that I can see and her mouth looks good. Her belly near her cloaca seems a little flabby though, but that may be normal and I just never noticed it before? Any ideas? How long should I wait before I start worrying?