Update...I DEFINITELY have a feather picker in the flock. Now that it has warmed up some, I have been able to be outside with the chickens and observe more. I already suspected who it was since she is not missing any feathers and I have seen her randomly pick at another once or twice. She started by picking all the fluffy down off the bottom of one hen and progressed to vent picking so that one hen has bleeding around the vent. I have been putting NuStock on the wound every night, hoping that it would help with healing AND cause a nasty taste in Miss Picker's beak. Unfortunately, she seems to bleed again every time she lays an egg. Wish I could get her to stop laying for a week so it can heal! I thought about applying NuStock and then applying castor oil on top of that to soften the area and keep it from re-cracking. I noticed feathers missing on another hen's bottom and a third hen's neck. I think she picks while in the run and maybe also on the roost, but not sure.
So...last night Miss Picker pecked at the poor wounded girl and made her shriek right in front of me and I sent the offender straight into chicken solitary confinement. I have a small chicken playpen/tractor that I use in the summer so I pulled that out and put it next to the existing coop and run. I put a large Pet Porter in there along with food and water. I put it next to a tarped area of the run, so she can only see the other birds when they are on one end of the run, but they can still see each other.
Has anyone else had this problem? Will separation help her to "snap out of it"? Or is it once a picker, always a picker and I have to get rid of her? If I get rid of her, will the next hen in the order take over picking? Sigh...I am obviously new to chickens so I have lots of questions. As a side note, I have tried more protein in their diet (mealworms, hamburger), more time out of the run, toys/treats like a flock block and hanging basket with greens to keep them busy. I'm sure boredom has a lot to do with it since it has been such a long winter. We have cabin fever and they have coop fever.