I have a Silke that is standing on one leg a lot and she seems to always be trembling. This has been going on for a few months, the other Silke's don't behave this way. She's a loner, too... doesn't hang out with the others much and they tend to pick on her. When I got her this summer she was also very sick, with I don't know what, but I got her back to health. Does any know what might be going on with her? I've looked in all my books.