For a modest fee, urban dogs are released into a large flatbed trailer with wire cage walls and a turf deck to frolic and take care of business. Could be equipped with a retractable roof for inclement weather. Every few stops, the conveyor belt turf deck is cycled half a turn, causing accumulated debris to fall into a collection chamber.-- nuclear hobo, Apr 13 2007 Greyhound racing on a conveyor belt would be kinda fun.-- skinflaps, Apr 13 2007 This is better than that comeditragic effort, "immobile dog run". Those immobile dogs just wanted more treats.-- bungston, Apr 13 2007 For a further fee, not quite as modest, we will get your dog down off the flatbed and give it back. mwhawhahahahhahaha....-- ConsulFlaminicus, Apr 14 2007 Sorta good. "Mobile dog run" would be one name. "The stinky truck" would be my pick.-- the dog's breakfast, Apr 14 2007 Bone Voyage.-- 2 fries shy of a happy meal, Apr 14 2007 random, halfbakery