We are expecting our very first baby chicks in 2 1/2 weeks. We can barely breathe we are so excited, and have done a ton of research and planning. We took an innocent trip to BLUE SEAL tday and fell in love with 2 ( Abt 2 week old?) chicks in their brooder. What would be the ramifications of the elder two and trying to integrate them with the newbies when they come??? We REALLY don't want to make any mistakes right off the bat! HELP and thank you!