We have seven hens. We have a 4x8 coop that sits up two feet off the ground. It is inside the chicken run which is 8x9. So they have 32 sf in the coop and 72 in the run. The girls are pecking each other's backs. Because of dogs in the yard, they do not get to leave their run. Is this too small for them. Five of the seven chickens have a good sized patch of feathers pecked off of their backs. If the run is an appropriate size, how do I get them to quit pecking each other?