I have a small free-ranging flock with seven birds of mixed ages and breeds. My two eldest are about 4 years old, followed by three 8 month old pullets and finally two 5 month olds - 1 pullet and 1 cockerel. The youngest two hatched via incubator in my son's kindergarten class this past June. The cockerel is the product of our Silver Laced Wyandotte and an Easter Egger rooster we no longer have (for spastic reasons) and the pullet was given to us when we brought our chick home so he wouldn't be lonely. They've all been living peacefully together for a few months and integrating the youngest went quite smoothly. Until the last week or two, my only complaint about said cockerel had been that he was overly enthusiastic when getting treats and would grab flesh and pull and I debated culling him for fear of aggression. However, despite his eagerness for food and with the wise words from a fellow BYC member, he learned quickly that humans are off-limits and he now keeps a respectful distance. He has recently discovered his voice and although he has fun letting everyone know he's here, he's surprisingly quiet about it and only does it on occasion - I actually haven't heard him in a few days and I work from home so I know he's not just waiting for me to leave. I have zero interest in breeding him but I had settled on him being able to live out his life as part of our flock. Having this flock of mixed breeds has given me a great opportunity to explore various breeds and I've decided, based upon my experience and research (and much more to do), to narrow down future additions to just two breeds which will include Wyandottes but mainly focus on Golden Spangled Hamburgs. I know I won't be ready to delve into this endeavor for another few years and will be using the time to do much more research and prepare housing for breeding flocks so as long as everyone is cooperative, I haven't been concerned with removing any flock members because...well...what's the rush? However, my cockerel's adolescent shenanigans are not tolerated by any of the ladies and when he goes after the youngest girl, two of the three older pullets challenge him, peck him and chase him off. I was starting to feel sorry for him but now he has turned on my GSH pullet (8 months old) and chases her away from food and treats no matter how many feeding "stations" I've given. He'll even rip food right out of her beak and clearly lacking in rooster etiquette. She has always been a bit of a loner and prefers the company of the two eldest hens. She will even come find me for company but he's completely isolating her and muscles her away from food and flock. She's very quick so he rarely gets a hold of her but when he does, he's yanking feathers out. I understand that he's likely targeted her because she's the smallest - less than half his size - and she is pretty non-confrontational with her flock mates but it doesn't seem like he's trying to get her to submit (no attempt at mating) so much as he is trying to run her right out of the flock. She looks to me for protection and I do stop him by walking right towards him and redirecting him away from her and sometimes the whole flock and I always wait until he's settled down and moved on before I get on to doing something else but I can't do that as often as he's going after her. Because of the size difference I have serious concerns about her being injured or worse. I could isolate him but because the flock free-ranges, I'm not exactly sure how to make it impossible for him not to see them. I welcome any and all suggestions on how to better manage the dynamics between these two. Thank you!