My Mother went in to close my chickens to find one of our chickens on the roof. She got the chicken down, but it was very unresponsive, not moving or even reacting to my dog. It eventually walked into our chicken coop. Later I went out to check on her, she was in the box, acting more active, even flying and cuddling with my other hens. Now my question is, was my chicken scared/attacked or is it some sickness? Please respond asap. It will be greatly appreciated.