Response to my 2nd letter-

I just got off the phone with Shanna, who I assume is the property manager.  she assured me they are "working on a solution, and trying to find out who is doing this."  additionally, we had a discussion of human vs. dog, and i think i convinced her that it was absolutely a human. She also said i made a good point about the dog poop bags, and she would make sure to keep them better stocked in the future.  It was a lot of crap, i'm sure, but it was nice that she at least acknowledged my concerns this time.  we'll see how it goes, i guess.