Well, I searched the tank for any signs of regurgitated food. As I was searching, I had to pick her up and she musked all over me and it smelled like skunk. I guess that is just the way her musk smells. I wonder if this has anything to do with her being sickly. I am convinced that she got into something in my neighbor's yard. My neighbor boasts all the time about her yard being organic and she has a sign up that says her garden was approved as a Wildlife Habitat. But her son told me that they sprayed some kind of poison in the yard to kill weeds.