I have a 5 week old chick that is about a third to a half size smaller than her brothers and sisters. She's acting fine, eats, runs around. She just doesn't seem to be maturing. The rest of the chicks are probably about ready to go outside into a chicken tractor, but I don't feel comfortable moving the little one from the brooder. I do have another batch of chicks coming soon. My question is--can I put Little Miss Thing in with the new chicks or would that be dangerous? I want to give her more time to mature.