Urates are the uric acid crystals excreted by the kidneys, and the liquid is excess water that she is drinking. Some of the fluids are coming from the bowel. Do you have a dark closet, basement, extra bathroom, or garage where there are no windows? Her feed does not have to be reduced a great amount, but the protein can be decreased, along with her daylight hours. A vet can insert 2 temporary stitches in the vent opening to hold the prolapse in, but the dark scabby material first needs to come off.