The rope/fishing string works well. I had hawks taking my chickens too until I put fishing string across the top of my pen. I crisscrossed it and hung white plastic streamers from them. I have not had anymore chickens taken. Another deterrent is crows. If you have crows hanging around don't chase them off (as I did earlier in my chicken years) I did not like them eating my chicken feed until I learned they will stop hawks from eating your chickens. And for anyone wondering about killing the hawks--it is against the law to shoot hawks even if they are killing your livestock. It is so easy to stop them from taking your chickens why kill them?