I read last week about using bailing string across my chicken yard to deter hawks. Seemed like an easy, good idea. I have my (their) coop and run attached by a passage door to a open yard surrounded by 100 ft of Electric poultry fencing. This has been in place for 3 year with no loses. I have part of an old run with a couple of poles with CDs in the middle of their yard. They like the structure. They go in it, on it and it provides a little sun protection. Now I’ve run the indestructible bailing string back and forth across the yard. Easy to do. No expense and I think, hope it will ward off the hawks.