Oh no, how awful! I'm so sorry for your losses. I'm afraid given your current setup this will keep happening, the hawks have found a chicken buffet and they will come back again and again. You have got to get some sort of covered run to protect them. Our run is completely covered with chicken wire and it's the best thing we did. I see the hawks circling and looking but they can't get to my chickens. Some people take the losses in stride and go on, but ours are more like pets so losses can be tragic for us. I do wish my chickens could enjoy free ranging, but there are just too many predators in our area and I can't risk it. Their run is pretty big and they are happy and healthy. Please don't give up on chickens, they are such a joy, but do provide them a covered run if possible. It's not the same as free ranging, but it's worth it to have happy protected birds and you and your kids won't have to go through this again. I'm so sorry this happened to you and your children, my heart goes out to you.