I currently have 8 chicks, 6 RIR and 2 BO, currently 3.5 weeks old. I have been told by folks on here that 2 are cocks. I do not want the cocks, and plan to get rid of them. That said, I have seen the option to buy chickens that are 4-9 weeks old, and I am tempted to go that route, but I don't know how soon I should do this, and if it is a good idea? Would I be able to go ahead and put the 4-9 week olds in with my current bunch, or should they be kept segregated? If I were to go with the day old chick route, how long would it be suggested to wait until I put them out with my current bunch, or if I did this soon, would it matter either way?