You would be suprised what wildlife live in "residential areas"! A coon could go through that chicken wire pretty quick! A mature possum probably could also. Coyotes and skunks, even bobcats can live in residential areas. Not to mention dogs! So, beef up that wire with some hardware cloth or 1x2 welded cage wire (over the whole run, not just the bottom...coons climb) and you will have a nice secure run for your chickens. If you screwed a big hook into the front of the frame, could you pull it with your lawnmower to move it around your yard? That would be nice for your chickens and your yard!