When my six chicks were 1.5 weeks old, I got 2 additional and have been keeping them in a separate brooder because the others just seem so much bigger. Will the week old chicks be okay if I place them in the larger brooder with the 3 week olds? What's the rule around this? Also, my brooder is 60 inches, by 24 inches. Is this large enough for 8 chicks? I have one chick with a real bad attitude Ha! She is always picking the down feathers off of my golden comet chicks. Should I worry about this? The others are all great. I read somewhere that this bad picking habit can be learned by the other chicks and retard normal feathering. Thanks for your help!