I got three 5 month old pullets on Sunday. My five other hens pick on them a little. Mary was the lowest in the order before, now she is being a bully. She pecks at them and holds on to them until they break away. They spend most of the day on the top nesting box hiding. If they come out she chases and pecks them. She will stand inside watching them and just being a bully. I have three feeders and two waterers. They drink and eat when I shush them outside and try n keep Mary away. How long does it usually take for them to civially get along?