Pecking order problem?

[chickndays]

So I have a Barred Rock (about 22 weeks) being picked upon by a Rhode Island Red (18 mos). Both female. I have observed the former being trapped and pinned by the latter and pecked. No injuries noticed. I'm a bit surprised this is happening because the BR is almost twice as bulky as the RIR but much more faster and agile. Do I just remove the troublemaker to a dog crate for awhile?

 

[Auntiejessi3]

There has to be an established order (the pecking order). These are still young pullets, so I'm sure there will be changes to the pecking order as time goes on. As long as no one is getting hurt I'd just let it play out and see if it resolves after some time. How many birds do you have and how big is your setup?

 

[BlindLemonChicken]

What other breeds to you have? Do you have more than on RIR?