I don't know how she was drinking her water in her previous home, but I assume she drank it out a bowl because we got all the supplies that were deemed necessary for her transition – no bowls were given because I said we already had some. She'd also only been with her previous owner for about 9 months, so I don't know what to assume, diet-wise. Previous owner mentioned having cooked special food for her on occasion, but that didn't last long due to time constraints.
DNA test kit has been ordered, another box ticked. Bringing in a sample of the not-so-pretty-poop for our Friday vet appointment. I'll continue to keep a close eye on everything going in and out. Meanwhile, it's very informative hearing from other folks. As my partner said, "It makes sense that an African dog wouldn't feel compelled to drink much water..." But I do feel more at ease having asked around.