We have 15 week+ old (hatched Mon 3/5) chicks currently in our brooder and I would love to add some americaunas to our flock. If I pick up a couple 4 day olds (hatched Mon 3/12), would they be ok to just add them to the brooder with the others? Or should I plan on a whole separate setup? If the latter, is there a point at which I can/should introduce them to each other as young'uns? Thanks!