This is helpful, I'm thinking of pulling my keepers out of the chick pen and letting them range with the big girls.
The big hens don't show much interest in them at all.
It the 2 little D'Uccles that stand at the fence, puff up feathers and scream in the chicks faces.
The big girls and bantams are great buddies. I had read here about letting them just encounter each other while free ranging. That worked well for me. They went to their own coops for months, til the chicken mansion was done.
Don't have enough housing to do that right now. I may try the add them at night, make a big ruckus in the morning thing to distract everyone, then let em go their ways...And watch for trouble.