I'm ready to put my 4 week old Ameracuanas out with my 12 older (9wk) old chicks. The 4 weekers are fully feathered (minus a few on the head) its super warm, even at night. I'm not even really concerned with the temp, its them being pecked to death I worry about! lol What is the right way to go about this? I had one out in the yard the other day and my older chicks were trying to attack her through the fence! Do I keep them close, but contained, or just put them in? I'm really worried the older ones will peck the 4 weekers. They tower over them! I also have 3 three week old Buff Orpingtons. Should I add them all in together with the big chicks, or wait a little longer before introducing the younger BOs?