6 girls are not enough. He is a BRAHMA.We get them from a hatchery (lol maybe they will take him back). Are Brahman's usually quieter than others? A crow or two in the am wouldn't be that bad, (still have to talk the husband into it) but if he's yelling all day and picking on the girls (there are 6) then he will have to leave. We also ordered a Silver Laced Wyandotte and she is growing up all black with green sheen (I'll post pictures of her later - not sure if she is a Jersey Giant or Australorp).
I would say you need more than 12 hens for him.