Got a problem with Tango, she will be two year's old in July, approximately 4ft, she has not eaten in two week's which is totally unlike her, she is normally such a glutton. She had a shed the day after her last meal and nothing since. She had just moved onto large mice after the shed and as soon as the mouse was lowered in she just backed off like she was frightened. Since then I have had to put her in her in her new tank, because the other was getting too small and this would not help much either. Each time I have put the mice in she just back's off up until last night. She actually started exploring them but still didn't eat them. How long do I give her before I need to get her checked? 