My cockerel and a couple of the hens seem to have had lots of their feathers pecked off. in my book it gives reasons for pecking being if they are too warm or if they are confined in too small a space. None of which seem to be possible as they are in a coop outside, which has ventilation. I rarely shut the door to the coop either as we have no foxes. They are also free to roam wherever they like. Has anyone got any ideas for other reasons for this.