Who Am I?

Who Am I Down this filthy street, filled with oily grime and evil gangsters committing crimes, I make my living. Walking day after day and night after night, wearing next to nothing, showing a lot of fleshy skin, with the drooling, tailed beasts that roam down this southern concrete jungle. Rendering my elite services to anyone who will ask me and pay me cash on demand. Because money's green, no matter how you earned it. I'm prepared to pick-up whatever shit that is plopped on the ground, because in my line of work, one's always prepared. Who am I? Answer: A City Dogwalker