Uh, this is kinda gross, but might make you feel a little better...
We live in the mountains, collect spring water in a concrete well-tile, and pump it into the house. the excess runs off into a branch in the yard.
About 2 weeks ago, the run-off stopped, so we have had to be very careful with the water. No prob, until yesterday, when I was showering. Suddenly the water smelled like I'd rolled around in something dead.
Guess what? Some critter crawled up the dry run-off pipe, looking for water, and fell into the well-tile, and drowned! In the past it has usually been a salamander. This smells baaaaad, like maybe a chipmunk, or something.