I have a beautiful white crested black polish that has been broody for almost 4 months. Yes, you heard that right,a polish that has been broody for almost 4 months. We had her outside in the hoop coop and she was sitting a several eggs. Right when they were getting ready to hatch, they disappeared and some others either weren't fertile or just didn't make it that far. We figured it was a snake that stole her eggs, so we "fixed" the coop. We gave her eggs from our buff orpington and again right before they were getting ready to hatch some of them disappeared. At this point we had to put her in the garage because we felt so bad for her. We put more chicken wire, cow panels, hard ware cloth, and even some plexi glass around the coop and run. Just a couple of days ago I was in the garage with her. She comes running out of her coop into her little run area with an egg in her mouth and then started pecking at it. I quickly ran over there but it was too late. My sister was coming to visit the next day so I asked her to bring her incubator. While we were letting the incubator set up, she did it again. My polish brought another egg out that had just started to hatch and killed it. Needless to say we immediately removed the remaining eggs and put them in the incubator. Then we gave her a cool bath and put her outside with my free range chickens. Why is she doing this?