I have 7 pullets1 cockerel all 10-13 weeks. I want to add some year old hens who are already laying into the bunch. Besides the quarantine what other advice can you very knowledgable chicken keepers give me. I am wondering if it would be ok to add another 8 hens. Also the breeds avail are Americana , Cochin, barrels rocks, polish, rir, pheonix, and a colt crosses…our flock is pretty friendly I'm wondering what we should add. We have 2 barreds, 2 Orpingtons, 1 silkie, 2 speckled Sussex, and 1 columbium rock. Thanks so much