Well said rot...for me it's a matter of minimizing contributions to the landfill, a whole different ballgame when it comes to pet waste.
cynthia - I did not know about the otter problem, certainly pays to be informed on these issues so thanks for that.
Interesting anecdote: in Alaska, winter freezing temps resulted in massive frozen deposits of dog poop in yards. When it thaws in spring, it becomes a stormwater pollution issue in towns and cities. A few years back they started encouraging composting of pet waste in special pet waste composters, partially sunk in the ground (such as the Doggie Doolie). One might think this is only a problem in the frozen North, but in a big city, the number of pets is enormous, and it can run off lawns as well as concrete.
I'll admit we're getting into advanced considerations here that may be above and beyond the OP's simple question.