dremora is doing something strange

[Morbids_Mom]

in the last few weeks that she has not eaten she poiints her head up in the air and opens her mouth wide like shes yawning. i put a mouse in her tank the other day and even tho she watched it like a hawk all she did was point her head upwards and open wide like she was yawning..whats up with that/ the only substrate i use is paper towels so i know shes got nothing caught in her mouth. is she maybe sick?