I think the other female, who is larger and a bit aggressive during the mating season, may have flipped her over. She may also have had trouble negotiating the rip-rap that she regularly climbs to a favorite spot. (She wouldn't tell me.) Now that we're home, we can check on them twice a day...
I just wanted to thank the people on this forum- you have probably saved the life of our beloved tortoise. We came home to find our 18 year old female desert tortoise on her back, not moving, and terribly dehydrated. I googled the topic and found this forum's[/size][/font] suggestion to give...