Hello again. Saw the video. First off, her fur does look disheveled, so something isn't quite right. Secindly, most ratties do NOT like when you touch them from their lower back to the base of their tail. It's the main general region in which they attack each other and also is how they defend their more vulnerable areas, by presenting that lower posterior area to the for in battle. . So there's no surprise that she protests your touching her there. OK, what happened to her toes!?!??? They are all bloody and inflamed looking. And if I'm not mistaken, she has no toenails! So that is where I would begin. Does she have any issues with her cage mate? How is her mate btw? Any issues with her? And has she been in any antibiotics lately? If not you might want to consider it. She might have an infection, possibly even a generalized, non -localized type, such as a blood infection. And that would be very bad, septic is a diagnosis that comes to mind. But this is all very much guesswork since I have nothing to base it on. So dont take my word for it, take her to a good specialized rattie vet. If you only know of a non-rattie specific vet, then do your homework and have all your ducks in a row so that YOU can steer the ship, so to speak, because your vet will probably be clueless. You may need some very specialized tests done, which are probably costly, so the more you can eliminate and the more you can isolate as symptoms will help you find a cause, or possible causes, to her lethargy. A vet can do some feeling around and poking and prodding to check various internal organs and the like, to see if there is an obvious problem you cant just see. An exotics vet, or a rat specializing vet, will be better with the information that they get from the exam, but if the vet is not an exotics vet, you (and they) can still relay the info obtained to an expert to get a better diagnosis. So, do as much as you can yourself,cto aid your vet, and question anything that strikes you as, well, questionable, and get the vets observations written down on paper so that you don't forget anything when you are getting expert advice. Hopefully your non-exotics vet knows of an expert in his/her field to call, like a personal friend, a "go to" associate that can be called with no notice in order to help diagnose you ratties malady. Good luck and hopefully you are at the vet as I write this.