Glad to hear it; hopefully diseases won't be an issue then. How about that big dog crate in the run as separation for a few days, and then if you free range, let them out together. Or let the new birds out into the run to get comfortable in it without the resident birds, and open things up at...
Welcome! If you are getting birds from a different source than your original hens, Isolation means TOTAL physical separation from the coop, as in far enough downwind that nothing can contaminate your flock. Maybe your garage? At least three to four weeks apart, and then introduce one of your...