Last week I was lucky enough to get a Cuckoo Maran, Golden Laced Wynadotte, and a Plymouth Barred Rock for free, all of which were newly hatched and adorable. Well, these happened to be my first chickens and although I was completely prepared for these little balls of love, I really wanted to add just a few more to the mix. I just got a Black Australorp, Welsummer, and Ameraucana and am hesitant in adding them into the brooder. The older chicks are one week old and noticeably larger then the new chicks. Should I just toss them in and observe, or is there a special way to put these three into the brooder with the other three. Any help is appreciated.