Have had nasty stallion chickens in the past, got rid of them. The girls were much happier.
Then I got a Polish Rooster (1.5 yrs old) a couple yrs ago. I was extremely worried about getting another Roo; seems he is something of a Casanova- the girls ALL love him, even my wee OEGB bantam hen only has eyes for him. She detests my OEGB bantam Roo (who is also a sweet heart and has his own harem of full sized hens hahahaha), and will only let Mr P the Polish Roo breed her. Or should I say squash her, and she doesn’t even complain!
I have 3 Roos here and each one is a sweetie pie, good to the hens, chicks, people. I really lucked out.
I have found that the amt of time spent with them as youngsters is what makes the difference. Whether mama raised or raised by me, I make sure day one to have them imprint on me and I hold them every day, bad manners are not allowed, I treat them as I would a young colt or dog, I give them every opportunity to be good and they receive treats for this. They know their names, and commands like, go home, go to bed, come here, NO!, good boy, treats (they really like that one).
Actually all my flock I handle this way. Same as when training horses. Or dogs. Or people! Be clear and be calm. Give rewards. Always end sessions on a good note so they get a treat for that. No treats unless they earm it!!!
Chickens are just as smart as a horse - but more devious. Make sure you set aside time to concentrate only on them, and don’t spend more than a few minutes at it. Don’t try a handling/training session if you’re in a hurry or angry or upset.
Oh and be regular about it. You cannot do this once every blue moon and expect results - that’s a recipe for getting angry with a lack of results.
Of course there will always be those Roos that just are bad boys, those need to go for dinner. Too bad one couldn’t geld a Roo like a bad colt… I have had some really nice ‘sports models’ over the years!