The past week or so my 4 3 month old pullets have been starting to change in personality. I think they're in the process of sorting out the pecking order. Up until now they've all been very docile and nice to each other. I noticed in the past week whenever they go out to free range which is only about an hour a day, my EE will run up to the others with her beak open, puff up big and either chest bump or snap at the others and then walks away. My BSL has been getting defensive this week even with our dog who unfortunately got too close and got pecked in the face by her. Today they were out in the bushes and I heard a loud squawk and my EE came tearing out of the bushes running around frantically. After that she started doing the poof up pecking at our Welsummer. She doesn't continually peck, and doesn't pluck feathers that I've seen, just a poof up, peck and walk away. Then my BSL approached the EE and she cowered and ran. It was like my EE was afraid of the BSL. The EE kept ducking under the other 2 chickens in a weaving pattern trying to dodge or hide from her. I'm definitely going to be keeping an eye open for wounds of any kind. Is this behavior normal? One girl picks on the next girl and she picks on the next girl? Will they work this out or should I separate them now and let them cool off?