Ideally, you would want the chicks to be a day old or less when giving them to a broody, but what's the oldest you've been able to sucessfully do it? I have a first time broody (going on 2 weeks) that I want to break with some chicks. I can pick up some golden brabanters but not until Monday. They will be 4-5 days old by then. I have some creams on order that I would happily substitute the goldens for if I can make it work. Wait for the creams or go for it?