Ok, so my new coop will be done in a few days...I will be putting my 2 nine week old Cochins in there along with my Runner duck and Pekin duck (both are hens). But I also have 8 bantams, they will be about 4 weeks old when the coop is finished. Is 4 weeks too young to be sleeping in the coop at night and out in the run in the day time? Should I keep them in a large cage in our garage until they are older? I would really like to put them in the coop/run so they can really get some fresh air and excercise!