Feed your local crow population. We had a MAJOR hawk problem when we first got our chickens, they were nesting all over our property. I tried CDs, fishing line, fake owls, the whole shebang. Nothing worked and I kept coming home to piles of feathers. Then one day I noticed a couple of crows sitting on top of my coop, so I threw a little corn on the ground outside of the run for them. The next day there were a few more there, and a few more the next day. Once I had attracted a gaggle of them, they began going from nest to nest and pitching the baby hawks to the ground (which was actually quite horrible to witness, but I'll be forever grateful to them for it) and chasing the parents away. Now the only time I even hear a hawk is when the crows have them on the run. The crows themselves can come with their own set of problems (stealing eggs, feed or chicks) but they've never given me any trouble. I just make sure to leave them a little snack everyday and they keep my yard safe from the hawks. I also have a pygmy goat that lives with my chickens, and I think he really helps too- but I'm always happy to see those crows get excited when I come to the coop with their red cup full of corn. Good luck, sorry about your loss.