I know that winters here in WI get long, and my chickens would like to get out soon. I think they have started picking at each other. Their tail feathers have started getting sparse on some of them. They are in a room about 6 x 12, for 8 chickens. They have a second level of about 6x3 that they go up on also. Are they picking at each other because they are in too small of a place? Are there other reasons that chickens pick at each other? Do they pick at their own feathers? Is it maybe that they are missing anything in their diet? I just got chickens last September, so I am somewhat of a newbie. Thanks!