Give your chickens a place to perch in the run by mounting a bar at the outside corner between the middle frame supports. To give your run a more natural look, a wide tree branch cut to length may be substituted.
Showing you my grit/oyster shell feeder I made today. The lid flips up to fill the tubes and is slanted to discourage chicken roosting. The wood is unfinished and all edges are sanded for the chicken's safety.