I'm new to raising chickens and am having a problem with a hen. She is a 7 month old Plymouth barred rock and disappeared around a week ago, no sign of a struggle or anything. We have a total of chickens and allow them to free range. We looked for but didn't find her. So we assumed something happened to her. We'll she showed back up today cold and hungry. I warmed her up, fed her and placed her back in the coop. We'll I let the chickens out and she took off again. All the chickens just come back at night to the coop but she is gone again... Any info is appreciated.