My BCM recently hatched 2 eggs. The chicks are about 5 days old and have just recently started exploring outside with mom. I've had my EE seperate do from her and the chicks since she went broody. Today I was transferring the chicks back into the half of the coop that was sectioned off and my BCM and EE got into a fight. How long can I expect the BCM to be aggressive and protective of the chicks?