That is a sign something is wrong. I am sorry to say but the typical behavior is very plucky. Try some vitamins/electrolytes in the water and maybe isolate her. Lots of people on here have had the same issue including myself. Some say don't medicate until you can figure out the problem. Are there any other signs? Is her tail pointing down? Is she eating? Pooping? Have you examined her feet and body? I just ask because maybe someone else can help if you give some more information.