We have only 3 Australorps and live in a wooded area with all the predators - Hawks, foxes, raccoons, etc. so a run was a necessity. In addition to the roosts, stumps and covered run, we put all purpose sand on the floor - makes for easy clean up with a long handled kitty litter scoop. The run is 10' X 14' and 6' tall with 18" apron around the base - there has been plenty of evidence of attempted digging but the girls are still alive and giving us eggs every day. We hung a wire basket from the roof and put greens in it to keep them entertained. Half inch hardware cloth used for all the run walls and apron. Thanks for this article!