Roo?

I would guess he is just trying to be king of the hill, he should calm down soon. If he is causing wounds ,I would put him in the meat locker.
I also had a barred rock roo and he was very aggresive toward the ladies untill about 6 months of age. He was great with beans and rice. good luck

 

Ditto on watch him. I don't worry about pulled feathers unless they really clear a big space or blood shows up. I have a pullet I had to pull from the flock because she was everyone's whipping boy and not only had half of the feathers pulled from her rear section, but had a big wound where they pecked her. Everyone's much happier with her pulled from the group and there are no further problems, so I'm not sure whey they chose to pick on her, but if I had problems with a particular bird injuring the others, they'd be gone.

 

i think young roos are very clumsy. mine are finally not pulling the feathers out and are more gentle now that the girls stop and squat for him..there is no chasing or harrassing them now..

 

I agree about the clumsy thing. They're just clods when they're young. And yes, feathers get pulled sometimes. It's not meanness unless it's excessive, they gotta hold on to something!

 

I'll include this link because it has some of the people I really trust on here talking about rooster behavior. I think it challenges some popular myths.

https://www.backyardchickens.com/forum/viewtopic.php?id=250327

In my opinion, some roosters deserve the crock pot, the ones that are naturally bullies or become a danger to humans. I also believe many, if not most, roosters that are oversexed or clumsy while teenagers will mature and mellow out if given the chance. It also helps a lot when the pullets are mature enough to stop resisting.

You might let him free range with the guineas or otherwise separate him until he and the ladies mature some more. I would not separate the ladies since they are already integrated. And just because some pullets submit does not mean he will leave the others alone. I've seen a rooster start the dance next to two pullets. One pullet squatted for him, but he had his eye on the one next to her. The momentary apple of his eye ran away and he ignored the willing gal. I have enough room so she easily got away from him.