We have 12 five-week old pullets. Our immediate neighbor got 8 chicks around the same time as us, so they should be the same age, give or take a week. We are combining the flocks and will definitely need to quarantine. At this point, both flocks are out in open pens during the day and only sleep in their brooder boxes at night. At the end of the four-week quarantine, the pullets will be 9 weeks. Should we use the brooder method of introducing or the method used for introducing adults? We are still working on getting a coop built to house all 20 and should have it ready at the end of the quarantine. At nine weeks old, would putting them all in at the same time in the new coop be effective, or disastrous? And at what time during the daily routine would it be recommended?