A couple of days ago I let mama and chick join the flock. Mama was protective for 1st day and my dominant cockerel 9m/o was too. Then mama bonded with a subordinate cockerel 7m/o. He was fine with the chick at first but yesterday started chasing it several times (perhaps to get it away from mama?). We separated the 7m/o cockerel from the flock but mama hen is trying to get inside his pen to join him. She's not weaned the chick fully but I am constantly reuniting them as the chick is still learning gates/pop doors to the free range paddock. She's not making mama clucks to the chick anymore. I'd hoped to keep the 7m/o cockerel, he seemed a good boy but I do not know if this chasing is going to be a long term problem as I run a mixed age flock and will continue to integrate chicks as I expand the flock (currently 16 hens plus the boys).