I had a couple of young Maran roosters (HAD!) that started brutalizing two of my favorite hens for no apparent reason. Which are our favorite hens?... well, the most docile, friendliest - and often also most submissive ones - right? These two hens were healthy and happy members of my flock until these roos started picking on them, bloodying their heads, chasing them whenever they saw them, until these girls were afraid to go into the coop and were pathetic and miserable. The more dominant rooster started it - so he went into the fridge first. Once he was gone, the 2nd rooster picked up where he'd left off. They weren't aggressive towards me - yet - but I think they were kind of testing their power and position in the flock, and started with the most submissive hens. Maybe they would have outgrown this (they were 6 months old) but I wasn't willing to wait for that. Neither hen was broody. Both hens are again happy and healthy members of my (now) peaceful and roosterless flock. I liked those roos - they were fertile eggs I'd gotten that one of my broodies hatched out for me, so I'd watched them grow up in my flock. They were gorgeous and I loved their crowing, but I couldn't handle the violence. So I'm just saying that the broody thing might be a red herring. My hens would HIDE from those roos in the nest boxes, but weren't broody - no other broody behaviors, but just afraid to come out...