Hi, and thank you for responding to my post!
I tried using the coconut fiber from a pet store, and no matter how moist I kept it when I first brought Tansy home, she always managed to get little fibers caught in her mouth when she would catch something to eat. I ended up just staying with native soil from the area that I know other woodhouse toads dwell. She has never swallowed the native stuff that I have seen. It does get in her eyes a bit after she has been in her water bowl.
I still assume Tansy is a girl toad, since her belly has mostly stayed white. Her throat and lower belly has darkened a little bit, but not the bluish/purple tint that is usually associated with males. The only time I have heard any noise from Tansy is if you hold her by her sides for too long. She will make a shuddering chirp. Not the weird "waaah" sound that the boys make.
I just wish she was more food motivated... I have rarely seen her eat in several months at least. I don't know if it is safe to try and force feed her... I have recently dumped all the old sand out and refreshed it with new sand collected from the park. I've also given her another (smaller) water bowl in addition to her large pond to see if that makes her a bit happier. I don't know. She is burrowed again, and I don't like to dig her up all the time to check on her. I do hope that she is just acting more lethargic because winter is coming...