when this kind of thing was happening on our block a long time ago, the kids at one of the houses spent one day of their spring break from school gathering up all the dog shit from their yard and those of other neighbours receiving the little shits from the little shit; not having a grill to use, they lined them up in very straight lines on the deck and picnic table until they ran out of room then they just started whipping them at the sliding glass door to get some to stick and piling enough into the eaves rain gutter to completely occlude it. about two weeks later, after the other dog shit had been swept up and the problem more or less resolved, we must have had the better part of 150 mm of rain in two hours' time and the result was a waterfall of shit coming off the roof. at least their lawn got some extra nitrogen and phosphorous in the deal . . .