Ok here goes. I have about 20 hens that we use for egg production. When I say egg production I mean I buy all of the feed and collect the eggs and the kids sell the eggs and get the money.
Im in central IL so the winters are pretty cold here. During the cold spells I shut the doors on the barn to keep them in out of the sometimes 30 to 35 below wind chills. Inside the barn I made a tent like contrapsion out of tarps and added 2 heat lamps to help keep it a little warmer. They laid eggs all winter long. They were free to roam the inside of the barn so they had plenty of room. About have way through the winter I started noticing that most all of the hens were starting to loose the feathers on thier backs. It didnt take long to figure out that they were pecking each other. Now its spring and I have naked backed chickens. Some are worse than other. I might add that weather permitting they are turn out daily and free to roam until they decide its to go back to the barn to roost.
Is this a common probblem and if so how can I prevent it because it seems that they have never really stopped pecking the feathers off each others back sense this ordeal started.

Im in central IL so the winters are pretty cold here. During the cold spells I shut the doors on the barn to keep them in out of the sometimes 30 to 35 below wind chills. Inside the barn I made a tent like contrapsion out of tarps and added 2 heat lamps to help keep it a little warmer. They laid eggs all winter long. They were free to roam the inside of the barn so they had plenty of room. About have way through the winter I started noticing that most all of the hens were starting to loose the feathers on thier backs. It didnt take long to figure out that they were pecking each other. Now its spring and I have naked backed chickens. Some are worse than other. I might add that weather permitting they are turn out daily and free to roam until they decide its to go back to the barn to roost.
Is this a common probblem and if so how can I prevent it because it seems that they have never really stopped pecking the feathers off each others back sense this ordeal started.