I have free-range hens and they're let out at 6 am. One day I went out at about 4 pm, and I found 2 dead hens 30 feet from the coop. They had their entire neck and head ripped off. The rest of their body was perfectly fine, and they looked as if they were laying down. The next day I found 1 about another 30 feet away in the same predicament. I haven't lost any since but I'm still nervous I might lose more. I think it was a hawk or owl but I'm not sure. Please, let me know your best guesses and perhaps help me think of a way to stop it from happening in the future. I really don't want to keep them penned in. All help will be appreciated.