One of my 3-year old female GTP's has been VERY vocal lately. She's always been a 'hisser', but she is vocalizing with a high pitched squeal that goes on until her lungs are deflated. It's very unnerving, and there is no evidence of a RI or any other problem other than she has not been interested in food since the holidays. She recently shed with no difficulty, and her last defecation was normal but pretty small. She is on a 12-hour light cycle, and her cage gets misted daily. The temperature under the radiant heat panel where the probe is averages 86-88 degrees, but she seems to like the upper perch on the cooler end of the cage. Tonight she struck at a warm FT rat, and then released and dropped it... and then went through a good 10-15 second shriek with her mouth slightly open. Any ideas what's going on with her?