Having a problem with pecking. I have 5 hens and 2 are getting pecked. I actually saw one of the wounded peck the other wounded hen. Nonetheless, one hen will NOT come in the coop at night. She is staying out in the freezing cold. She goes in to lay eggs and get food/water during the day but when I check them at night, she isn't in. I have a coop that fits up to 8 chickens, a heat lamp that I leave on at night ( it's been in the teens here). One night she was in and I went to shut the automatic door and she actually RAN out. I can't get to her because she goes to a very tight space. I put grease on her back which seems to be a remedy recommended by 2 old farmers I talked with. This should stop the pecking but she needs to get warm. This same hen was pecked early on in her life by someone in this flock. It's the only flock I've had. No new additions. I know that's a lot of info but I'd hate to lose her to weather.