My Chilean Rosehair Tarantula is not eating. She is at least 15 yrs old and has not molted in some time. Her abdomen is almost completely bald. She doesn't move much and has not spun any new gossamer since I cleaned her cage out last. I added a cricket to her tank and it landed right next to her. This used to spell certain disaster for the cricket, but now she acts as if she is scared of it. She shows no interest. I have left the cricket over night in the tank (standard 10gal) and find it happy and chirping the next morning. Is she about to molt? Is she about to die of old age? This is the longest I have had a tarantula, so I am unfamiliar with their behavior in their golden years. Any help would help. Thanks.