well the youngest hens are 12 weeks. I put them in the coop by themselves for about an hour. Then opened the door to the run. Th entire flock went into coop and they were all fine. When the younger hens went to go out into the run the rooster chased them all over. then he grabbed one by the back of the neck. He was on her. Not sure if he was trying to mate or kill the hen. I need advice on what to do next. Thinking I need to get rid of rooster, but I don’t want to. Please advice.