My little peep is now 3 weeks old. I was wondering when would be a good time to let it start meeting the rest of the flock? It has lived in the brooder with mom and can be seen by my other chickens. I tried to introduce them when he was a few days old and my roo was very mean to him. I know some pecks are to be expected but I don't want it injured. Is it big enough to withstand my roo or should I wait a while longer? I hate keeping mom and baby in the pen all the time while the others free range.