Our 6 Bantam birds are coming up on 5 months of age and just moved in with us about a week and a half ago. We have two roosters (OE and a black Bearded Silkie) and four hens (two Dorkings, a black Bearded Silkie and an OE). They all sleep huddled together and forage together all day just fine, but I see them challenging each other occasionally. Once established does the pecking order change? How often? What about when we introduce 15 full size pullets? They are great chickens so far and nobody has been injured, I'm hoping it stays that way.