I have three, 8-week old pullets and a small flock of three mature hens. They have been living outside in a coop & run separate from the older hens, but still right next to the hens' coop & run so they can get used to each other. They've been out like this for a few weeks now. The older hens will sometimes try and peck the youngsters through the chicken wire, but that's it. My question is - at around what age should I allow the young pullets to begin free-ranging with the older hens? I would like to eventually have them all in the same coop and run, but I want the babies to be big enough to defend themselves from the big hens if necessary. I'd like to have them begin free-ranging together to begin with so that they can get used to each other and establish a pecking order, but don't want the babies to get too hurt. Thanks!