I have a 5 year old Kingsnake who seems sick. She makes this weird sqeaking sound and has not shed in a while. She used to have no problem eatingt but as of late it has been hit or miss. Sometimes she eats and oher times she refuses. Now I have noticed her stretching and opening her mouth quite a bit. (She had pnemonia when I got her as a baby and she used to open her mouth then). I am not sure if she is just getting ready to shed(it's been months) or if she is sick. Does anyone have any idea what could be wrong?