I have just seperated our 12 RIR's due to the fact that our make-shift brooders are not big enough for all of them. I put 6 in two seperate boxes. 1 set of the 6 is very quiet and tend to sleep alot. On the other hand in the other box, they haven't stop eating, drinking, and being chirpy. Are they happy that the other 6 is out? Are they having to much fun? Or are they just thanking me for giving them all more room?