In the past couple of days, we have been letting our chickens run free in the backyard because it's been so cold recently (and their coop is in a shady area). But today, I let them out and was gone for approximately 10minutes but when I came back, our white barred rock hen who is only about 7 months old was gone! We looked all over the neighborhood for her but couldn't find her. She was one of our favorites and we only have 6 chickens. We do have falcons? Hawks? Anyway, big birds circling above at some times....do you think they took her or she somehow could have managed to get outside? :'( And once this happens, does the likelihood of it happening again increase? Maybe will will just buy a run and put them inside. Please help me figure out what happened and how to prevent it in the future.