Okay Im curious..what should I do? I have 7 babies that are about a week old. I saw a posting on my local craigslist that someone is selling Australorp chicks that are 5 days old. When would I be able to put them in with my old babies? I know normally with the older birds you wait 30 days(give or take some) to make sure they dont bring anything new into your flock. Do I do the same with baby chicks? Or can I just put them right in together? Wait a week? I would think the sooner I put them together the better they would 'grow up' together. Right now I have them in a old rabbit hutch thats in the barn. They are not out with my older birds or anything. What should I do? ETA: She also said these baby chicks are sexed. Can you do that with Australorps at only 5 days old?