Our bantam Cochin sometimes has 30+ girls to watch. Not using him for breeding as he's a frizzled, and our bantam Cochin girls are frizzled also, so no frizzled/frizzled mixing. So he lives with the LF girls, some who go into different pens for breeding.
But Little Guy is fine with his flock, he's also top roo in that group even with everyone and all the other roos in there. He does have his favorites for breeding, he's not too interested in our BAs, SLWs or JGs but he LOVES his Barred Rock girls, but he'll watch out for all his girls and call all of them over for tasty treats and such.