I just got a bunch of new chickens to add to my flock. I was told they are a little over a year old. The majority of them have bare " picked" bellies. What does this mean? I am thinking how they used to roost, maybe it allowed for feather picking there as from on top they appear normal. And ... if a chicken is going to pick feathers off of another chicken, wouldn't it be all over, not just on the underside? Any thoughts? Please share any thoughts!