I have two moms with their chicks in a separate pen right now. One hen has a 2-3 week old while the other has 2, 1 week olds. They seem to be raising them together. The one mom is very nice, while the other is mean to anyone that get near the babies. They are starting to outgrow the little pen that was only meant for 2. I was wondering when we can add them to the flock. We had a problem with our ducks killing newly hatch ones( we lost 2 that were barely a couple hours old), so that is why they were not in there. The ducks went to my uncle's pond today after killing 2, 12 week old pullets. The other chickens are fine with newcomers and luckily enough, the mean mom is normally the mean one when we add other chickens in. The rooster does not even seem to notice when another hen is added and he thinks all of them are his right away. They all did fine when we added 2, 6 week olds (the two that were killed by the ducks). There was only a little pecking to establish order, but for the most part, they were left alone. These chicks have not seen the sky since they were born, and the hens are starting to try to get out whenever I open the door.