There's what I am guessing is about a weeks difference in age. My husband didn't get hatch dates, but our Easter egger and one of our Rhode Island reds were among the last chicks left in their bunch when he got them. They were almost all purchased the same day. We added three a few days later but all were purchased within a week of each other, with about a week or at most two between oldest and youngest. We still have the red sex link separated, she looks a lot better, and she keeps sneaking out to sit on top of the brooder with everyone else in it. Our older birds appear basically fully feathered, and are close to a month old, but I don't want to put them in the coop until everyone can go, I don't want it to become their coop before everyone can join them. So is it ok to put her back with everyone else? The dried blood we couldn't get off has turned brown. I can't think of a good solution to the space becoming to small for them, they make a slightly bigger tub, I guess I could look into purchasing that, but we modified the cover of this one, cutting out the middle and adding hardware mesh to keep them in there because they kept flying out, and we would have to do it again, and the bigger tub is that harder plastic, which I am sure would be harder to cut through. So is there a good solution? Should I buy a separate tub, just for the two older birds? There has been no further violence. Also, is it necessary to pluck the remains of all the feathers they ripped off if she is no longer bleeding?