We have an Australorp who is about 5 weeks old and a RIR who is about 4 1/2 weeks old, and then 3 golden comets, each about 2 weeks old. The AU and RIR are in a brooder together and the comets are in a separate one. Its pretty cold here still (40s to 50s) but is getting warmer so we plan to put the older ones in an outdoor coop at 6-7 weeks, when it will be in the 50s to 60s, but we want to introduce the chicks to eachother before that. When should we introduce them? After we put the older ones in the coop, should we put the younger ones in when they are 7 weeks? We really want to avoid pecking, and we have a nipple waterer which was successful in stoppinng the AU from pecking the RIR, but will this be enough distraction given the substantial size difference? We also might keep the older ones in a bigger pen in our shed and then introduce them there. What is the best way to do this?