I have 10 Buff Opringtons that are moving from brooder to coop this weekend. I've read that it's important to keep them in the coop for a while, to train them where home is. Once trained, and larger, they will free range in my fenced-in back yard. My coop has an attached, covered run. While training them that the coop is home, can they go in the run, too, or do they need to be locked in the coop only? Thanks.