I've noticed so many people making negative comments about using fishing line as a deterrent for hawks. I agree that this isn't 100% but many of the comments are from people who haven't tried it. Unfortunately, I was desperate and had to try something. We were leaving for vacation the next day when I realized several of my pullets were gone. I found the fishing line idea on BYC. My friend and my adult daughter volunteered to put up the line so my husband and I could leave as planned. (I didn't want to go but my hubby was counting on this trip). I haven't lost another chicken since-not one! I can't speak for all situations but I have nothing but good to say about what it did for me!