We had a similar issue with a neighbor's dog. The large dog's early morning routine as it ran unleashed, included depositing a huge pile of poo on our front steps. Despite our polite request to the dog's owner, to "please keep your dog on a leash" with explanation of WHY, the dog became used to his early morning deposit. OUR dog was safely doing her thing in a 9ft long cement, roofed, fenced, do run which we kept clean. We patiently stored a week's worth of both dog's deposits in a large plastic contractor bag. Now this was during high summer in ol Virginny's hot and humid weather. By the end of the week, the bag was positively heaving (literally). Under cover of darkness, and with his nose plugged with Vick's
, my Ninja husband unloaded the quagmire on the neighbor's front yard. No further exchange was necessary, and the neighbors' dog was leashed from then on......