I have a bit of a dilemma. I have 4 Wyadottes and 4 Barred rock that are pushing 7 weeks, 4 Buff Orpingtons pushing 5 weeks and 4 white leghorns pushing 3 weeks. Some pics of the size of them Barred Rock and Orpintons Wyandotte 2 leghorns and 1 buff. 2 Leghorns With the the others The reason I ask is because It seems like the older ones are getting cabin feeder in the brooder. (Running and flying around. pecking at the screen cover, stuff like that) My brooder, Originally 33x72. Then I added "2nd" floor then "3rd" floor. To give them more room View 2nd floor. View of the 3rd floor Yeah it ain't pretty but I don't plan on keeping it once they are out. (find a sucker to buy it or take it apart and burn it) The weather shows temps in the low to mid 40s at night and Mid 50s to 70 during the day. I am pretty sure the oldest 8 will be ok and also the buffs. They seem pretty well feathered out.Kinda worried about the leghorns tho. The coop is 12' x 6' with one 6' wall and 1 8' wall. Its still not ready for the chicks but I think I can finish it up enough for the chicks in the next couple days. OK, There's about all the facts. My questions... Leave them in the brooder and don't worry about the cabin fever? Will the leghorns be OK in them kind of temps? (heat lamp) Would it be OK to separate the older ones and leave the little ones behind for a couple weeks? ( I am pretty sure the answer is NO!) Could somebody come over and give me a hand finishing the coop and building a run?