I have two EE, one Barnevelder and one Silkie. The B has decided to chase and bully the little silkie. There is no blood yet, but she does pull feathers. When they are out and about the silkie keeps to herself. In the run, which is big for four chickens, the B will run over to the silkie just to attack her. There is plenty of water. How many feeders should I put out there? I think it may be food related.