I've read the many posts but wondering if there is a difference for numbers? I have just 2 chickens - happy and healthy 8 month old barred rock hens. I would like to add one more of a different breed and near same age. Since I'm adding just one do you think the whole quarantine process is necessary or do you think she'll just know she's the new kid on the block? Would a day of free range, putting them together in the coop at night and then a 2nd day of free range would be sufficient?