I have one SS rooster, one SS hen and 5 Austalorp hens in my coop, all five months old. I have 15 day old chicks coming next week, they will go in the brooder in the basement. We are in Northern VT. Everything I have read tells me not to try to put the younger chicks in the coop with the older until they are the same size. The problem is I don't think my 6'x6' pen in the basement is big enough to hold 15 birds until they are full-size (Dominiques and SS). I have a couple of different ideas on how to handle this: 1. Put all the new birds in the coop at 8-10 weeks old. Perhaps there are enough of them that the size/age difference won't lead to attacks. (unlikely) 2. Between 8-10 weeks let the birds free-range in the backyard together. One day put'em all back in the outdoor coop together. 3. At 8-10 weeks swap housing. Putting the 7 older birds in the basement pen and the 15 new birds in the outdoor coop (8'x14'). After 2-3 nights start putting the older birds back in the outdoor coop 1-2 at a time, each day, until they are all in the outdoor coop together. (This sounds kind of weird but I'm leaning this way) Your comments and suggestions are much appreciated.