At what age can guineas be successfully turned loose to free range? I've read they need to be "mature" but about what age is that? A guy that I work with says he turns his guineas loose directly from the brooder and they do okay. Is that okay? Seems like once they don't need to be confined to a brooder anymore that they would need to be kept loose in the coop for a week or so before you just open the coop door....right, wrong, or in difference? Thanks.