We are new to the whole chicken thing, and started with 9 assorted babies that are now 14-10 weeks old. They all get along great and have a new coop and yard. I have since started a 2nd batch of 10 chicks that are 3-6 weeks old. Some of them have all their feathers and I am considering taking them out of the shop and introducing them to the big girls outside. The only fear I have is that the first group are so much bigger then the new batch. Any suggestions on this situation? Should I wait until they are as big as the others. I have a black silkie in the first group that is about the same size and my Russian Orloff in the small group.