I seem to have a problem with flock dynamics: my lowest ranking hen Marble has left the flock and is spending the night in a crack underneath our house instead of in the coop. It's the second time she's been doing this. First time, last week, she had a bleeding pecking injury and I isolated her from the flock. She fled from the isolation cage and hid herself for two nights in that crack under the house. Then she came back and was loitering near the run door, so I shooed her back in and reunited her with the others - her wound had healed in the meantime. Today, when my chickens had their late afternoon "free range hour" in the garden I threw them some treats and Marble got pecked sharply a few times when trying to get at the treats. She then ran away from the others and went straight to the crack under the house which she apparently remembered from last week. When the rest of the flock returned to the coop at sunset; she didn't join them but stayed in her hiding place. She doesn't seem to be broody (she was last fall but then she stayed in the coop and was all puffed up, now she isn't). She does seem to have a problem with the rest of the flock - even when she's in the coop and the run, she usually keeps away from the others. When they are in the run she's alone in the coop and when they are in the coop, she's sometimes alone in the run.The rooster doesn't mate with her. While she clearly is the lowest ranking hen, she has pecked the rooster a few times and he actually avoids her. He literally jumped out of her way today. Marble is 14 months old and was one of my first three chickens. Half a year ago I expanded the flock and added a hen with her two chicks (they've grown up and are layers themselves now) and later on I added a rooster. The two other "old-timer" hens tolerate her, she even seems to be sort of friends with them. The three newer hens (mother and two daughters) can't stand her at all and peck her whenever they can. They seem to hate the sight of her, even from a distance. The rooster, as I said, avoids her. What should I do? Leave her to lead a dangerous solitary life outside the run and coop and hope she doesn't get eaten by a predator? Force her back in with the others every time, if I can catch her? Re-home her? (but how would she get along in a new flock? Also, I'm somewhat attached to her, she always reminds me of my worst teenage years, lol) Get rid of the three hens that can't stand her? That's half my laying flock. Any recommendations?