I currently have three hens, who I let free-run for the majority of the day. Despite knowing each other from since they were chicks, recently they have been getting into multiple fights and bouts, usually involving my Deleware hen. I know it might just signify the determining of pecking order, but doesn't that usually occur when new hens are introduced with each other? No blood has been shed yet, but I can see it in the future. Any suggestions?