I have 7 1/2 week old bantam SPR & the hens look like SPR, but the roos are just going from a sort of barred look to getting their silver wing feathers & black breasts. How long before they get their adult looking plumage, so I can tell what they will look like? Do bantams mature faster or slower than standards? I have 14 roos and will only keep 1-2, so I want to pick one that looks like it should. These are hatchery birds, so I am not expecting the world, but would like as nice a one as possible! When do bantams reach their adult weight? Thanks.