We just built a 75'x75' run. Hawks nest in the trees maybe 150' from the run, and circle and fly over, but I have never seen a hawk go after a chicken here. Either I don't catch it, or they have easier prey available (I have 50 8-week-olds in the run and have not lost one so far.) But I am concerned. So, I plan to scrounge up a bunch of old cd's and mount them on top of the fence posts loosely so they will move in the wind; we have lots of wind here. Also plan to pick up several of those metallic looking shiny pinwheels and plant them around. I noticed they had a bin of them at the local agricultural supply store, so guess they seem to be of use to some. Also plan to implement some of the other suggestions here; I will be transplanting some shrubs/tall weeds tomorrow, and there will be a teepee sort of thing in a few days, made of metal roofing and scrap lumber. I have also seen some sort of shiny streamers flying from fence post tops around here.
Just to share my experience, as well as a couple of other suggestions I've seen here.
Just to share my experience, as well as a couple of other suggestions I've seen here.