Ok, right now I have 4 adult chickens. 2 standards (1 a roo) and 2 bantams. Inside their large run I have a tractor that is housing 4 Cornish Rock chicks that will be 5 weeks old tomorrow. Inside my garage I have 2 brooders, each with 4 chicks. The largest brooder has an EE and a New Hamp Red that will be 6 weeks old on Friday and 2 mystery chicks that seem to be bantams, or very small stanadards, that will be 5 weeks old tomorrow. The other brooder is very small and is housing 4 standard chicks that will be 2 weeks old on Wednesday. Confused yet? Anyway, here is my problem.... I need to get the EE and NHR out of that brooder! They're almost completely feathered out and they act like they are beyond ready to experience life in something bigger. I want to put them in the tractor with the Cornish Rocks. Also, the younger chicks are quickly outgrowing their brooder and need to move into the bigger one! Question #1 -- I'm feeding the Cornish Rocks 15% grower/finisher so they don't grow so fast. The EE & NHR are eating 18% starter. Should I go ahead and put them together in the tractor and just mix the two foods together? Will the piggy CRs let the other chicks eat enough to stay alive? Question #2 -- At what age will it be safe to try to integrate the fast growing CRs in with my adult chickens? I don't want them getting beat up! Or should I leave them in the tractor until we get our new run built in a few weeks and move the adults there before letting the CRs out of the tractor? Help!