@dsm No, if the temperature is high enough (i.e. 80-90F) you don't have to wait for her to expel waste. Just push a frozen-thawed rat up against her mouth or force feed it to her. If you can find or buy a syringe, also buy liquid calcium w/ d3 and liquid vitamins made for reptiles and amphibians... Inject the mouse with it to pack it with nutrition.

Just feed an appropriate sized mouse to her (half size rule). Seems like she's acclimating real well to the water setup... Nice.