Couple things here Hattie, Older hen/young roo, she`s gonna establish her dominance. When he is old enough to be a man, he will dominate her. Until that time, she`s gonna make his life hell every chance she gets.
I watched this drama play out in my own yard. It was quite intertaining. I purchased some Americauna hens. The largest was mean to the other 3 so I penned her with a young Spanish Game Stag. She beat the snot outta him for a couple months. She would chase him around and the only place he could get relief was on the roost. One day, while feeding, I noticed that he was acting braver. She jumped him and he kicked back. This little tounement continued, so I watched. As things progressed, I could see she was determined to rule this youngster. It was as if he became so angry you could see it all over him. He whipped her in about 10 minutes and then proceeded to assert himself by chasing her all over the pen. Up on the roost and finally into the nest where he continued to wear her out. After a while, he walked away, satisfied that he was now the "cock of the walk" and there was never another minutes trouble between them.
Your boy is gonna have hell to pay until he grows some cahones. Make sure he has room to escape, but don`t worry about him. He`ll be fine.
